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Crepis species Stock Photos and Images
RFR0BPYJ–Digital improved high quality reproduction: Crepis biennis is a European species of flowering plant in the daisy family with the common name rough hawksbeard
RM2H43BD1–Two species of hawk's beard plant (Crepis species): flowering and fruiting stems. Coloured lithograph by W. G. Smith, c. 1863, after himself.
RF2A9YXYC–Crepis rubra (pink hawk's-beard) is native to the eastern Mediterranean region where it grows in rocky fields and meadows.
RF2GJN9NY–Crepis vesicaria is a European species of flowering plant in the daisy family with the common name beaked hawks beard
RMCREW2A–stinking hawk's-beard (Crepis foetida), infructescence with pappus, Germany, North Rhine-Westphalia
RF2DF55AR–Smooth Hawksbeard ( Crepis capillaris ) Yellow Composite Wildflower, Flowering in September, UK
RFT601RK–The common name of Crepis rubra is red hawksbeard or pink hawk's-beard. It's a European species of flowering plant in the daisy family & found in the
RFTA6KFK–Yellow flowers of Asteraceae / Compositae species. Thought to be Rough Hawksbeard / Crepis biennis. SEE ADDITIONAL NOTES
RF2X3YY85–Crepis vesicaria is a species of herbaceous plant of the genus Crepis in the Asteraceae family
RMW7N9CN–Solitary Mining bee (Andrena sp.) feeding on Beaked Hawksbeard (Crepis versicaria) flowers as an expert ornothologist, volunteers and members of the public count bird species in the background during Arnos Vale Cemetery Bioblitz, Bristol, UK, May 2012. Did you know? There are more than 200 species of Solitary bee in the UK.
RF2AHY8J8–Crepis biennis, daisy family, rough hawksbeard / Wiesen-Pippau, Crepis biennis, Zweijähriger Pippau, Familie der Korbblütengewächse, Digital improved reproduction of an original print from the 19th century / digitale Reproduktion von einer Originalvorlage aus dem 19. Jahrhundert
RM2T89GJR–Natural closeup on a small female Furrow bee, Lasioglossum collecting pollen from a yellow Crepis flower
![Archive image from page 4 of Cytological studies of five interspecific. Cytological studies of five interspecific hybrids of Crepis leontodontoides cytologicalstudi65aver Year: 1930 1930] Avery: Hybrids of Crepis leontodontoides 137 with C. leontodontoides were obtained. C. aurea is the only species of the subgenus Catonia with which hybrids were secured, although extensive crosses were made with C. tingitana. ¥1 hybrids were also secured with the Barkliausia species C. marschaUi. In every case the F1 hybrids possessed features characteristic of each of the two parental species. In three cas Stock Photo](https://c8.alamy.com/comp/W26XB1/archive-image-from-page-4-of-cytological-studies-of-five-interspecific-cytological-studies-of-five-interspecific-hybrids-of-crepis-leontodontoides-cytologicalstudi65aver-year-1930-1930-avery-hybrids-of-crepis-leontodontoides-137-with-c-leontodontoides-were-obtained-c-aurea-is-the-only-species-of-the-subgenus-catonia-with-which-hybrids-were-secured-although-extensive-crosses-were-made-with-c-tingitana-1-hybrids-were-also-secured-with-the-barkliausia-species-c-marschaui-in-every-case-the-f1-hybrids-possessed-features-characteristic-of-each-of-the-two-parental-species-in-three-cas-W26XB1.jpg "Archive image from page 4 of Cytological studies of five interspecific. Cytological studies of five interspecific hybrids of Crepis leontodontoides cytologicalstudi65aver Year: 1930 1930] Avery: Hybrids of Crepis leontodontoides 137 with C. leontodontoides were obtained. C. aurea is the only species of the subgenus Catonia with which hybrids were secured, although extensive crosses were made with C. tingitana. ¥1 hybrids were also secured with the Barkliausia species C. marschaUi. In every case the F1 hybrids possessed features characteristic of each of the two parental species. In three cas Stock Photo")
RMW26XB1–Archive image from page 4 of Cytological studies of five interspecific. Cytological studies of five interspecific hybrids of Crepis leontodontoides cytologicalstudi65aver Year: 1930 1930] Avery: Hybrids of Crepis leontodontoides 137 with C. leontodontoides were obtained. C. aurea is the only species of the subgenus Catonia with which hybrids were secured, although extensive crosses were made with C. tingitana. ¥1 hybrids were also secured with the Barkliausia species C. marschaUi. In every case the F1 hybrids possessed features characteristic of each of the two parental species. In three cas
RM2B13KDM–Rough hawk's-beard (Crepis biennis), flower meadow, Germany, Baden-Wuerttemberg, Swabian Alb
RFT9M2HC–Yellow flowers of Asteraceae / Compositae species. Thought to be Rough Hawksbeard / Crepis biennis. SEE ADDITIONAL NOTES
RM2AWECK2–The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . t strengthbefore winter. My fasciated races of Crepis biennis andTaraxacum officinale are very instructive in this connec-tion. Sowings of Crepis, made in April and May, gavefrom 30-40% of fasciated individuals. Sowings madeat the end of Ji-ily produced 20% only, and those made inSeptember none at all. Similarly, Taraxacum officiiiale,when sown in spring, produced 13 to 27% of fasciations.whilst a sowing made in August did not produce evenso much as a single flattened flower-stalk. ^ur la cii
![. Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 137 with C. leontodontoides were obtained. C. aurea is the only species of the subgenus Catonia with which hybrids were secured, although extensive crosses were made with C. tingitana. ¥1 hybrids were also secured with the Barkliausia species C. marschaUi. In every case the F1 hybrids possessed features characteristic of each of the two parental species. In three cases the hybrid resem- bled one parent more closely than the other in its gross morph Stock Photo](https://c8.alamy.com/comp/PFKAT5/cytological-studies-of-five-interspecific-hybrids-of-crepis-leontodontoides-karyokinesis-crepis-1930-avery-hybrids-of-crepis-leontodontoides-137-with-c-leontodontoides-were-obtained-c-aurea-is-the-only-species-of-the-subgenus-catonia-with-which-hybrids-were-secured-although-extensive-crosses-were-made-with-c-tingitana-1-hybrids-were-also-secured-with-the-barkliausia-species-c-marschaui-in-every-case-the-f1-hybrids-possessed-features-characteristic-of-each-of-the-two-parental-species-in-three-cases-the-hybrid-resem-bled-one-parent-more-closely-than-the-other-in-its-gross-morph-PFKAT5.jpg ". Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 137 with C. leontodontoides were obtained. C. aurea is the only species of the subgenus Catonia with which hybrids were secured, although extensive crosses were made with C. tingitana. ¥1 hybrids were also secured with the Barkliausia species C. marschaUi. In every case the F1 hybrids possessed features characteristic of each of the two parental species. In three cases the hybrid resem- bled one parent more closely than the other in its gross morph Stock Photo")
RMPFKAT5–. Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 137 with C. leontodontoides were obtained. C. aurea is the only species of the subgenus Catonia with which hybrids were secured, although extensive crosses were made with C. tingitana. ¥1 hybrids were also secured with the Barkliausia species C. marschaUi. In every case the F1 hybrids possessed features characteristic of each of the two parental species. In three cases the hybrid resem- bled one parent more closely than the other in its gross morph
![Archive image from page 22 of Cytological studies of five interspecific. Cytological studies of five interspecific hybrids of Crepis leontodontoides cytologicalstudi65aver Year: 1930 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pa Stock Photo](https://c8.alamy.com/comp/W22K7C/archive-image-from-page-22-of-cytological-studies-of-five-interspecific-cytological-studies-of-five-interspecific-hybrids-of-crepis-leontodontoides-cytologicalstudi65aver-year-1930-1930-avery-hybrids-of-crepis-leontodontoides-155-meiosis-in-meiotic-divisions-the-chromosomes-of-the-two-species-cannot-be-distinguished-in-contrast-to-the-other-hybrids-there-is-great-regularity-in-meiosis-at-diakinesis-5n-or-4n-2r-are-seen-in-figure-15a-one-pair-of-chromosomes-appears-to-be-only-loosely-associated-fig-15-meiosis-in-ft-c-leontodontoides-aurea-a-diakinesis-with-five-pairs-one-pa-W22K7C.jpg "Archive image from page 22 of Cytological studies of five interspecific. Cytological studies of five interspecific hybrids of Crepis leontodontoides cytologicalstudi65aver Year: 1930 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pa Stock Photo")
RMW22K7C–Archive image from page 22 of Cytological studies of five interspecific. Cytological studies of five interspecific hybrids of Crepis leontodontoides cytologicalstudi65aver Year: 1930 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pa
RFTA6KGJ–Yellow flowers of Asteraceae / Compositae species. Thought to be Rough Hawksbeard / Crepis biennis. SEE ADDITIONAL NOTES
RM2CGWTCD–. The standard cyclopedia of horticulture; a discussion, for the amateur, and the professional and commercial grower, of the kinds, characteristics and methods of cultivation of the species of plants grown in the regions of the United States and Canada for ornament, for fancy, for fruit and for vegetables; with keys to the natural families and genera, descriptions of the horticultural capabilities of the states and provinces and dependent islands, and sketches of eminent horticulturists . 1105. Crepis rubra. (XM) 890 CREPIS CRINUM C. barbala, Linn.=ToIpi3.—C. montana, Reich. 12-18 in.: Ivs.une
![. Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated. Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pair loosely associated; b, and c, I—M, with five bivalents; d, I-M, with four bivalents Stock Photo](https://c8.alamy.com/comp/PFKAK8/cytological-studies-of-five-interspecific-hybrids-of-crepis-leontodontoides-karyokinesis-crepis-1930-avery-hybrids-of-crepis-leontodontoides-155-meiosis-in-meiotic-divisions-the-chromosomes-of-the-two-species-cannot-be-distinguished-in-contrast-to-the-other-hybrids-there-is-great-regularity-in-meiosis-at-diakinesis-5n-or-4n-2r-are-seen-in-figure-15a-one-pair-of-chromosomes-appears-to-be-only-loosely-associated-fig-15-meiosis-in-ft-c-leontodontoides-aurea-a-diakinesis-with-five-pairs-one-pair-loosely-associated-b-and-c-im-with-five-bivalents-d-i-m-with-four-bivalents-PFKAK8.jpg ". Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated. Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pair loosely associated; b, and c, I—M, with five bivalents; d, I-M, with four bivalents Stock Photo")
RMPFKAK8–. Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated. Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pair loosely associated; b, and c, I—M, with five bivalents; d, I-M, with four bivalents
RMW24526–Archive image from page 206 of Cytology (1961). Cytology cytology00wils Year: 1961 seem to account very well for the range of chromosome numbers in Crepis (Babcock, 1947) especially since interspecific hybrids between species with n = 4 and n = 3 show the latter to have a chromosome partially homologous to two in the former. There is also a good deal of Figure 8-7. Photomicrograph of Ring of 12 Chromosomes in Rhoeo discolor Produced as the Result of Multiple Translocation. (From Darlington, C. D. and LaCour. L. F., 1960. 'The Handling of Chromosomes,' 3rd ed., George Allen & Unwin. Ltd.,
RFT9M1Y3–Yellow flowers of Asteraceae / Compositae species. Thought to be Rough Hawksbeard / Crepis biennis. SEE ADDITIONAL NOTES
RM2CE6DH4–. Exploration and survey of the Valley of the Great Salt Lake of Utah : including a reconnoissance of a new route through the Rocky Mountains. . hey are variable in number, and in others are entirelywanting, Crepis acuminata, Nutt. 1. c; Torr. and Gray, Fl. 2, 489.—Stansburys Island, Salt Lake, June 23. This is the tallest of ourindigenous species of Crepis. Some of our specimens are aboutthree feet high. The radical leaves (including the petioles) aremore than a foot in length. Plate VIII. Crepis acuminata, of the natural size. Fig. 1, aseparate flower magnified, as are the following. Fig. 2,
![. Cytology. Cytology. seem to account very well for the range of chromosome numbers in Crepis (Babcock, 1947) especially since interspecific hybrids between species with n = 4 and n = 3 show the latter to have a chromosome partially homologous to two in the former. There is also a good deal of. Figure 8-7. Photomicrograph of Ring of 12 Chromosomes in Rhoeo discolor Produced as the Result of Multiple Translocation. (From Darlington, C. D. and LaCour. L. F., 1960. "The Handling of Chromosomes," 3rd ed., George Allen & Unwin. Ltd., London, England, Plate XVIL) evidence that similar Stock Photo](https://c8.alamy.com/comp/PFH8NJ/cytology-cytology-seem-to-account-very-well-for-the-range-of-chromosome-numbers-in-crepis-babcock-1947-especially-since-interspecific-hybrids-between-species-with-n-=-4-and-n-=-3-show-the-latter-to-have-a-chromosome-partially-homologous-to-two-in-the-former-there-is-also-a-good-deal-of-figure-8-7-photomicrograph-of-ring-of-12-chromosomes-in-rhoeo-discolor-produced-as-the-result-of-multiple-translocation-from-darlington-c-d-and-lacour-l-f-1960-quotthe-handling-of-chromosomesquot-3rd-ed-george-allen-amp-unwin-ltd-london-england-plate-xvil-evidence-that-similar-PFH8NJ.jpg ". Cytology. Cytology. seem to account very well for the range of chromosome numbers in Crepis (Babcock, 1947) especially since interspecific hybrids between species with n = 4 and n = 3 show the latter to have a chromosome partially homologous to two in the former. There is also a good deal of. Figure 8-7. Photomicrograph of Ring of 12 Chromosomes in Rhoeo discolor Produced as the Result of Multiple Translocation. (From Darlington, C. D. and LaCour. L. F., 1960. "The Handling of Chromosomes," 3rd ed., George Allen & Unwin. Ltd., London, England, Plate XVIL) evidence that similar Stock Photo")
RMPFH8NJ–. Cytology. Cytology. seem to account very well for the range of chromosome numbers in Crepis (Babcock, 1947) especially since interspecific hybrids between species with n = 4 and n = 3 show the latter to have a chromosome partially homologous to two in the former. There is also a good deal of. Figure 8-7. Photomicrograph of Ring of 12 Chromosomes in Rhoeo discolor Produced as the Result of Multiple Translocation. (From Darlington, C. D. and LaCour. L. F., 1960. "The Handling of Chromosomes," 3rd ed., George Allen & Unwin. Ltd., London, England, Plate XVIL) evidence that similar
![. Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 1934] Babcock-Cameron: Chromosomes and Phytogeny in Crepis. II 291 Without going into details or pausing to discuss certain exceptional species which are difficult to classify according to the foregoing scheme, it is obvious that there is progressive specialization in the structure of both involueral bracts and achenes. Along with this increasing special- ization there is a definite trend toward reduction in length of life. Thus, all Catonia species are perennial; while one- Stock Photo](https://c8.alamy.com/comp/RJ54JE/chromosomes-and-phylogeny-in-crepis-ii-the-relationships-of-one-hundred-eight-species-crepis-plants-karyokinesis-1934-babcock-cameron-chromosomes-and-phytogeny-in-crepis-ii-291-without-going-into-details-or-pausing-to-discuss-certain-exceptional-species-which-are-difficult-to-classify-according-to-the-foregoing-scheme-it-is-obvious-that-there-is-progressive-specialization-in-the-structure-of-both-involueral-bracts-and-achenes-along-with-this-increasing-special-ization-there-is-a-definite-trend-toward-reduction-in-length-of-life-thus-all-catonia-species-are-perennial-while-one-RJ54JE.jpg ". Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 1934] Babcock-Cameron: Chromosomes and Phytogeny in Crepis. II 291 Without going into details or pausing to discuss certain exceptional species which are difficult to classify according to the foregoing scheme, it is obvious that there is progressive specialization in the structure of both involueral bracts and achenes. Along with this increasing special- ization there is a definite trend toward reduction in length of life. Thus, all Catonia species are perennial; while one- Stock Photo")
RMRJ54JE–. Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 1934] Babcock-Cameron: Chromosomes and Phytogeny in Crepis. II 291 Without going into details or pausing to discuss certain exceptional species which are difficult to classify according to the foregoing scheme, it is obvious that there is progressive specialization in the structure of both involueral bracts and achenes. Along with this increasing special- ization there is a definite trend toward reduction in length of life. Thus, all Catonia species are perennial; while one-
![. Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 137 with C. leontodontoides were obtained. C. aurea is the only species of the subgenus Catonia with which hybrids were secured, although extensive crosses were made with C. tingitana. ¥1 hybrids were also secured with the Barkliausia species C. marschaUi. In every case the F1 hybrids possessed features characteristic of each of the two parental species. In three cases the hybrid resem- bled one parent more closely than the other in its gross morph Stock Photo](https://c8.alamy.com/comp/RD2C84/cytological-studies-of-five-interspecific-hybrids-of-crepis-leontodontoides-karyokinesis-crepis-1930-avery-hybrids-of-crepis-leontodontoides-137-with-c-leontodontoides-were-obtained-c-aurea-is-the-only-species-of-the-subgenus-catonia-with-which-hybrids-were-secured-although-extensive-crosses-were-made-with-c-tingitana-1-hybrids-were-also-secured-with-the-barkliausia-species-c-marschaui-in-every-case-the-f1-hybrids-possessed-features-characteristic-of-each-of-the-two-parental-species-in-three-cases-the-hybrid-resem-bled-one-parent-more-closely-than-the-other-in-its-gross-morph-RD2C84.jpg ". Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 137 with C. leontodontoides were obtained. C. aurea is the only species of the subgenus Catonia with which hybrids were secured, although extensive crosses were made with C. tingitana. ¥1 hybrids were also secured with the Barkliausia species C. marschaUi. In every case the F1 hybrids possessed features characteristic of each of the two parental species. In three cases the hybrid resem- bled one parent more closely than the other in its gross morph Stock Photo")
RMRD2C84–. Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 137 with C. leontodontoides were obtained. C. aurea is the only species of the subgenus Catonia with which hybrids were secured, although extensive crosses were made with C. tingitana. ¥1 hybrids were also secured with the Barkliausia species C. marschaUi. In every case the F1 hybrids possessed features characteristic of each of the two parental species. In three cases the hybrid resem- bled one parent more closely than the other in its gross morph
RMRJ54J9–. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. 22 University of California Publications in Agricultural Sciences [Vol. 6 C. tenuifolia Pterotheca sancta a b Figure 15. another in the central region is probably similar to the short one in the middle lower portion of the figure. This was the only plate observed in which there appeared to be 4 satellited chromosomes although 3 were seen very commonly. Whatever the origin of this species the evidence points to some form of parthenogenesis or apog- amy as the usual means of reproduction. This would reconcile the irregularity in
RMRJ54K6–. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. C. blattarioldes c. burejenaia C. chrysantha C. conyzaefolia. C. paludosa e Figure 8. more in similar material (unpublished observations). Plants of these two accessions are now in flower. Although 1827, with 8 chromo- somes, is more nearly typical of the species in shape of leaves and habit of branching, yet the flower-heads and finer details of the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may
RMRJ54J1–. Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 294 University of California Publications in Agricultural Sciences [Vol. 6 general, however, the degree of morphological resemblance is roughly indicated by this diagram. The 5-paired species, especially sibirica and pontana, are in several respects among the most primitive morphological types in the entire genus, while aurea, particularly subsp. lucida, exhibits the greatest re- CATONIA PHYLOGENY AND CHROMOSOME NUMBER AUREA IOv HOOKERIANA 8 PONTANA 10 SIBIRICA 10 VISCIDULA
![. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. 1930] Hollingshead-Babcock: Chromosomes and Phylogeny in Crepis 21 decision as to their exact number. The chromosomes of C. biennis and C. ciliata are of the same size order. The group of four species with 2n = 12 (fig. 13), C. mollis, C. Iijrata, C. montana, C. hierosolymitana, gave material on which it was somewhat difficult to make out exact details of chromosome morphology. The chromosome outlines were not quite so clear as in most species and the increased number added to the difficulty. True satellites were found in mont Stock Photo](https://c8.alamy.com/comp/RJ54JK/chromosomes-and-phylogeny-in-crepis-crepis-plants-chromosomes-1930-hollingshead-babcock-chromosomes-and-phylogeny-in-crepis-21-decision-as-to-their-exact-number-the-chromosomes-of-c-biennis-and-c-ciliata-are-of-the-same-size-order-the-group-of-four-species-with-2n-=-12-fig-13-c-mollis-c-iijrata-c-montana-c-hierosolymitana-gave-material-on-which-it-was-somewhat-difficult-to-make-out-exact-details-of-chromosome-morphology-the-chromosome-outlines-were-not-quite-so-clear-as-in-most-species-and-the-increased-number-added-to-the-difficulty-true-satellites-were-found-in-mont-RJ54JK.jpg ". Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. 1930] Hollingshead-Babcock: Chromosomes and Phylogeny in Crepis 21 decision as to their exact number. The chromosomes of C. biennis and C. ciliata are of the same size order. The group of four species with 2n = 12 (fig. 13), C. mollis, C. Iijrata, C. montana, C. hierosolymitana, gave material on which it was somewhat difficult to make out exact details of chromosome morphology. The chromosome outlines were not quite so clear as in most species and the increased number added to the difficulty. True satellites were found in mont Stock Photo")
RMRJ54JK–. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. 1930] Hollingshead-Babcock: Chromosomes and Phylogeny in Crepis 21 decision as to their exact number. The chromosomes of C. biennis and C. ciliata are of the same size order. The group of four species with 2n = 12 (fig. 13), C. mollis, C. Iijrata, C. montana, C. hierosolymitana, gave material on which it was somewhat difficult to make out exact details of chromosome morphology. The chromosome outlines were not quite so clear as in most species and the increased number added to the difficulty. True satellites were found in mont
![. Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 1934] Babcock-Cameron: Chromosomes and Phylogeny in Crepis. II 299 species must have hybridized with certain 4-paired species and produced through amphidiploidy the 22-paired American species and their poly- ploid relatives shown at the top of figure 4 (cf. fig. 156). Barkhausia The phylogenetic relations of thirty-two species of Barkhausia and their chromosome numbers are shown in figure 5. In general the most primi- BARKHAUSIA PHYLOGENY AND CHROMOSOME NUMBER HACKELII 16 TA Stock Photo](https://c8.alamy.com/comp/RJ54H3/chromosomes-and-phylogeny-in-crepis-ii-the-relationships-of-one-hundred-eight-species-crepis-plants-karyokinesis-1934-babcock-cameron-chromosomes-and-phylogeny-in-crepis-ii-299-species-must-have-hybridized-with-certain-4-paired-species-and-produced-through-amphidiploidy-the-22-paired-american-species-and-their-poly-ploid-relatives-shown-at-the-top-of-figure-4-cf-fig-156-barkhausia-the-phylogenetic-relations-of-thirty-two-species-of-barkhausia-and-their-chromosome-numbers-are-shown-in-figure-5-in-general-the-most-primi-barkhausia-phylogeny-and-chromosome-number-hackelii-16-ta-RJ54H3.jpg ". Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 1934] Babcock-Cameron: Chromosomes and Phylogeny in Crepis. II 299 species must have hybridized with certain 4-paired species and produced through amphidiploidy the 22-paired American species and their poly- ploid relatives shown at the top of figure 4 (cf. fig. 156). Barkhausia The phylogenetic relations of thirty-two species of Barkhausia and their chromosome numbers are shown in figure 5. In general the most primi- BARKHAUSIA PHYLOGENY AND CHROMOSOME NUMBER HACKELII 16 TA Stock Photo")
RMRJ54H3–. Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 1934] Babcock-Cameron: Chromosomes and Phylogeny in Crepis. II 299 species must have hybridized with certain 4-paired species and produced through amphidiploidy the 22-paired American species and their poly- ploid relatives shown at the top of figure 4 (cf. fig. 156). Barkhausia The phylogenetic relations of thirty-two species of Barkhausia and their chromosome numbers are shown in figure 5. In general the most primi- BARKHAUSIA PHYLOGENY AND CHROMOSOME NUMBER HACKELII 16 TA
![. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. 1930] Hollingshead-Babcock: Chromosomes and Phytogeny in Crepi.s 27 the possibility that the somatic number 22 exists in this species, too, as it does in occidentalis and gracilis. The C. andersoni, glauca, runcinata group (fig. 22) of which several plants representing different accessions (table 1) have been C. andersoni 2086 C. andersoni 2136 m. C. runcinata 2065 e Figure 22. examined, has given uniformly complexes of 22 chromosomes contain- ing similar types. Whether it would be possible by a prolonged study to reveal diffe Stock Photo](https://c8.alamy.com/comp/RJ54G5/chromosomes-and-phylogeny-in-crepis-crepis-plants-chromosomes-1930-hollingshead-babcock-chromosomes-and-phytogeny-in-crepis-27-the-possibility-that-the-somatic-number-22-exists-in-this-species-too-as-it-does-in-occidentalis-and-gracilis-the-c-andersoni-glauca-runcinata-group-fig-22-of-which-several-plants-representing-different-accessions-table-1-have-been-c-andersoni-2086-c-andersoni-2136-m-c-runcinata-2065-e-figure-22-examined-has-given-uniformly-complexes-of-22-chromosomes-contain-ing-similar-types-whether-it-would-be-possible-by-a-prolonged-study-to-reveal-diffe-RJ54G5.jpg ". Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. 1930] Hollingshead-Babcock: Chromosomes and Phytogeny in Crepi.s 27 the possibility that the somatic number 22 exists in this species, too, as it does in occidentalis and gracilis. The C. andersoni, glauca, runcinata group (fig. 22) of which several plants representing different accessions (table 1) have been C. andersoni 2086 C. andersoni 2136 m. C. runcinata 2065 e Figure 22. examined, has given uniformly complexes of 22 chromosomes contain- ing similar types. Whether it would be possible by a prolonged study to reveal diffe Stock Photo")
RMRJ54G5–. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. 1930] Hollingshead-Babcock: Chromosomes and Phytogeny in Crepi.s 27 the possibility that the somatic number 22 exists in this species, too, as it does in occidentalis and gracilis. The C. andersoni, glauca, runcinata group (fig. 22) of which several plants representing different accessions (table 1) have been C. andersoni 2086 C. andersoni 2136 m. C. runcinata 2065 e Figure 22. examined, has given uniformly complexes of 22 chromosomes contain- ing similar types. Whether it would be possible by a prolonged study to reveal diffe
![. Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 292 University of California Publications in Agricultural Sciences [Vol. 6 The basic numbers common to all three subgenera are 8 and 10, there being fifty-five species with eight, and nineteen species with ten chro- mosomes. In Catonia and Eucrepis there is a third basic number, namely, 12, and in Eucrepis, a fourth, namely, 14. But as will be shown, these "basic" numbers are not all equally primitive. Furthermore, the subgen- era may contain more than one phylogen Stock Photo](https://c8.alamy.com/comp/RJ54J8/chromosomes-and-phylogeny-in-crepis-ii-the-relationships-of-one-hundred-eight-species-crepis-plants-karyokinesis-292-university-of-california-publications-in-agricultural-sciences-vol-6-the-basic-numbers-common-to-all-three-subgenera-are-8-and-10-there-being-fifty-five-species-with-eight-and-nineteen-species-with-ten-chro-mosomes-in-catonia-and-eucrepis-there-is-a-third-basic-number-namely-12-and-in-eucrepis-a-fourth-namely-14-but-as-will-be-shown-these-quotbasicquot-numbers-are-not-all-equally-primitive-furthermore-the-subgen-era-may-contain-more-than-one-phylogen-RJ54J8.jpg ". Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 292 University of California Publications in Agricultural Sciences [Vol. 6 The basic numbers common to all three subgenera are 8 and 10, there being fifty-five species with eight, and nineteen species with ten chro- mosomes. In Catonia and Eucrepis there is a third basic number, namely, 12, and in Eucrepis, a fourth, namely, 14. But as will be shown, these "basic" numbers are not all equally primitive. Furthermore, the subgen- era may contain more than one phylogen Stock Photo")
RMRJ54J8–. Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 292 University of California Publications in Agricultural Sciences [Vol. 6 The basic numbers common to all three subgenera are 8 and 10, there being fifty-five species with eight, and nineteen species with ten chro- mosomes. In Catonia and Eucrepis there is a third basic number, namely, 12, and in Eucrepis, a fourth, namely, 14. But as will be shown, these "basic" numbers are not all equally primitive. Furthermore, the subgen- era may contain more than one phylogen
RMRJ54MJ–. Chromosome number and individuality in the genus Crepis. Crepis; Karyokinesis. 19261 Bdbcock—Lesley: Chromosome* and Taxonomic Relationships 327. -V Fig. 7. Typical achene of: y, Crepis sibhica. X 7 circa. from that of taraxacif olia in Barkhausia, but biennis (N = 20) and montana (N = 6) stand apart from all other species from the stand- point of chromosome number. It should be observed that C. neglecta has long been a troublesome species to students of this difficult genus. In the Genera Plantarum (Bentham and Hooker, 1873) neglecta is considered as intermediate. Please note that these ima
RMREA7X2–. The continental element in the flora of south Sweden. Plants. THE CONTINENTAL ELORA OF SOUTH SWEDEN 299 moraine hillocks and ridges has been given by Sernander (igo8). The following steppe species are to be found there: Artemisia campestris (Plate 5), Asperula tinctoria (Plate 5 and 15), Centaurea jacea (? spontaneous), Crepis praemorsa (P* 3^5)' Fragaria viridis, Phleum Boehmeri (Plate 5), Polygala comosa (p. 316), Potentilla rupestris (p. 326), Prunella grandiflora (Plate 6), Ranunculus polyanthe- mos (p. 319), Seseli libanotis (p. 334), Stipa pennata (cf. Appendix I), Trifolium montanum (
![. Cytology. Cytology. seem to account very well for the range of chromosome numbers in Crepis (Babcock, 1947) especially since interspecific hybrids between species with n = 4 and n = 3 show the latter to have a chromosome partially homologous to two in the former. There is also a good deal of. Figure 8-7. Photomicrograph of Ring of 12 Chromosomes in Rhoeo discolor Produced as the Result of Multiple Translocation. (From Darlington, C. D. and LaCour. L. F., 1960. "The Handling of Chromosomes," 3rd ed., George Allen & Unwin. Ltd., London, England, Plate XVIL) evidence that similar Stock Photo](https://c8.alamy.com/comp/RD2B3W/cytology-cytology-seem-to-account-very-well-for-the-range-of-chromosome-numbers-in-crepis-babcock-1947-especially-since-interspecific-hybrids-between-species-with-n-=-4-and-n-=-3-show-the-latter-to-have-a-chromosome-partially-homologous-to-two-in-the-former-there-is-also-a-good-deal-of-figure-8-7-photomicrograph-of-ring-of-12-chromosomes-in-rhoeo-discolor-produced-as-the-result-of-multiple-translocation-from-darlington-c-d-and-lacour-l-f-1960-quotthe-handling-of-chromosomesquot-3rd-ed-george-allen-amp-unwin-ltd-london-england-plate-xvil-evidence-that-similar-RD2B3W.jpg ". Cytology. Cytology. seem to account very well for the range of chromosome numbers in Crepis (Babcock, 1947) especially since interspecific hybrids between species with n = 4 and n = 3 show the latter to have a chromosome partially homologous to two in the former. There is also a good deal of. Figure 8-7. Photomicrograph of Ring of 12 Chromosomes in Rhoeo discolor Produced as the Result of Multiple Translocation. (From Darlington, C. D. and LaCour. L. F., 1960. "The Handling of Chromosomes," 3rd ed., George Allen & Unwin. Ltd., London, England, Plate XVIL) evidence that similar Stock Photo")
RMRD2B3W–. Cytology. Cytology. seem to account very well for the range of chromosome numbers in Crepis (Babcock, 1947) especially since interspecific hybrids between species with n = 4 and n = 3 show the latter to have a chromosome partially homologous to two in the former. There is also a good deal of. Figure 8-7. Photomicrograph of Ring of 12 Chromosomes in Rhoeo discolor Produced as the Result of Multiple Translocation. (From Darlington, C. D. and LaCour. L. F., 1960. "The Handling of Chromosomes," 3rd ed., George Allen & Unwin. Ltd., London, England, Plate XVIL) evidence that similar
RMRJ54HH–. Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species. Crepis; Plants; Karyokinesis. 296 University of California Publications in Agricultural Sciences [Vol. 6 On the other side of patula are tenuifolia and the gymnopus-pterothe- coides group. Evidence that tenuifolia has 4 as the hasic haploid number will be presented under chromosome morphology. This species is the EUCREPIS-PHYLOGENY AMD CHROMOSOME NUMBER MONTICOLA 55? SCOPULORUM 44 ? OCCIDENTALS 22.44 ^ATRIBARBA 88? f^BARBIGERA 88? LaCUMINATA 33.44. 55? LGRACILIS 22.55? ANDERSONII ZZ GLAUCA ZZ RUNCINATA
RMRJ54K1–. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. 18 University of California Publications in Agricultural Sciences [Vol. 6 inflorescence are very similar in the two. Apparently 2174, with 16 chromosomes, is a form of this species resulting from some sort of chromosomal variation, the precise nature of which can be deter- mined only by further study. C. aurea a. C. bungei 1827 C. bungei 2174 If C. tingitana e Figure 9. C. tingitana (2n= 10, fig. 9e) has chromosomes resembling those of C asturica but differing markedly from them in one chromosome pair. Eucrepis The chromosomes
RMRJ54GE–. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. C. acuminata 1778 a C. gracilis 2572 c. C. acuminata 1830 C. barbigera 1842 Figure 21. given was the most likely one. In C. Occident alls, C. gracilis, and C. acuminata, variation in number between different forms has been found. The occurrence of the odd numbers 33 and 55 point to natural crossing and there is abundant morphological evidence that natural crossing, even between species, is no uncommon occurrence. The occurrence of the numbers 33 and 44 in typical C. acuminata suggests. Please note that these images are extract
![. Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated. Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pair loosely associated; b, and c, I—M, with five bivalents; d, I-M, with four bivalents Stock Photo](https://c8.alamy.com/comp/RD2BT9/cytological-studies-of-five-interspecific-hybrids-of-crepis-leontodontoides-karyokinesis-crepis-1930-avery-hybrids-of-crepis-leontodontoides-155-meiosis-in-meiotic-divisions-the-chromosomes-of-the-two-species-cannot-be-distinguished-in-contrast-to-the-other-hybrids-there-is-great-regularity-in-meiosis-at-diakinesis-5n-or-4n-2r-are-seen-in-figure-15a-one-pair-of-chromosomes-appears-to-be-only-loosely-associated-fig-15-meiosis-in-ft-c-leontodontoides-aurea-a-diakinesis-with-five-pairs-one-pair-loosely-associated-b-and-c-im-with-five-bivalents-d-i-m-with-four-bivalents-RD2BT9.jpg ". Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated. Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pair loosely associated; b, and c, I—M, with five bivalents; d, I-M, with four bivalents Stock Photo")
RMRD2BT9–. Cytological studies of five interspecific hybrids of Crepis leontodontoides. Karyokinesis; Crepis. 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated. Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pair loosely associated; b, and c, I—M, with five bivalents; d, I-M, with four bivalents
RMREA7X4–. The continental element in the flora of south Sweden. Botany -- Sweden. THE CONTINENTAL FLORA OF SOUTH SWEDEN 299 moraine hillocks and ridges has been given by Sernander (igo8). The following steppe species are to be found there: Artemisia campestris (Plate 5), Asperula tinctoria (Plate 5 and 15), Centaurea jacea (? spontaneous), Crepis praemorsa (P' 315)^ Fragaria viridis, Phleum Boehmeri (Plate 5), Polygala comosa (p. 316), Potentilla rupestris (p. 326), Prunella grandiflora (Plate 6), Ranunculus polyanthe- mos (p. 319), Seseli libanotis (p. 334), Stipa pennata (cf. Appendix I), Trifolium
RMRJ54MT–. Chromosome number and individuality in the genus Crepis. Crepis; Karyokinesis. 326 University of California Publications in Agricultural Sciences [Vol.2 ship with a urea, this species is cytologically very different from all other species of Crepis, having 9 pairs of short chromosomes. The only species studied which it at all resembles in tins respect is japonica. which has 8 pairs of chromosomes of similar size.. Fig. 6. Typical achen.es of: u, Crepis bulbosa; v, C. japonica—v', cross-section outline; w, C, anna; x, ('. blattarioides. X 6.5 circa. Section IX. Eucrepis, contains six of our t
RMRJ54KX–. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. 14 University of California Publications in Agricultural Sciences [Vol. 6 3°$. C. rubra 1506 c. rubra 1176 a b Figure 3. Crepis aspera, C. bursif cilia, C. setosa, and C. senecioides (fig. 4). with 8 chromosomes each, are quite different in details of their chro- mosome morphology. C. setosa is characterized by the presence of a pair of large satellites and C. senecioides is outstanding among the 8-chromosome species by the small size of its chromosomes.. Please note that these images are extracted from scanned page images tha
RMRJ54KM–. Chromosomes and phylogeny in Crepis. Crepis; Plants; Chromosomes. C. rubra 1506 c. rubra 1176 a b Figure 3. Crepis aspera, C. bursif cilia, C. setosa, and C. senecioides (fig. 4). with 8 chromosomes each, are quite different in details of their chro- mosome morphology. C. setosa is characterized by the presence of a pair of large satellites and C. senecioides is outstanding among the 8-chromosome species by the small size of its chromosomes.. C. aspera C. bursifolia a b C. setosa C. senecioides c d Figure 4. Crepis bureniana, C. aculeata, and C. amplexifolia (fig. 5) with 8 chromosomes, are
RMRC92FC–. Embryogenesis in plants. Embryology. 292 EMBRYOGENESIS IN PLANTS Cytological disturbances and somewhat comparable polyembryonic developments have been observed in Alnus rugosa (Fagales: Betulaceae) by Woodworth (1930) and in Atraphaxis frutescens (Polygonaceae) by Edman (1931). In the latter species, where both micropylar and chalazal embryos were formed, the latter usually degenerated. In. Fig. 81. Further examples of polyembryony A, Potentilla aiirea (after Lebegue). B, Crepis capillaris (after Gerassimova). C, Sagittaria graminia (after Johri). D, Spathiphyllum patinii (after Schurhoff).
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