Abstract
This paper presents a palynological study of 14 Janusia species and seven species belonging Aspicarpa, Camarea and Cottsia to contribute to the taxonomic study of the Gaudichaudieae tribe. The pollen grains were examined under optical and scanning electron microscopy. The pollen grains are generally spheroidal or cuboidal, medium to large, 6-8-porate and display variable colpoids and ornamentations. Janusia pollen grains vary in their quantitative characteristics, apertures and ornamentation. In some Janusia species, we observed the presence of a lipid substance on the pollen grains, likely pollenkitt. The pollen morphology of the cleistogamic flowers of Janusia guaranitica is clearly distinct from the pollen grains of chasmogamous flowers in all species analysed. Janusia anisandra, Janusia caudata and Janusia christianeae possess harmomegathic mechanisms, and the presence of colpoids also in J. guaranitica (chasmogamous flower) may suggest a direct relationship between these species, although their presence is more frequent in more humid areas. The results of palynological analysis suggest that the studied genera cannot be delimited using palynological characteristics but that they may be helpful to distinguish among genera.
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The authors thank Dra. Carmem L.A.P. Zottarelli for granting the optical microscope used to complete the photographs.
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Appendix: Specimens examined
Appendix: Specimens examined
Aspicarpa harleyi W. R. Anderson: BRAZIL. Bahia: Caetité, 18-II-1992, AM Carvalho 3723* (SP).
Aspicarpa pulchella (Griseb.) O’Donell & Lourteig: BRAZIL. Mato Grosso do Sul: Ladário, 1-XII-1998, G Damasceno Jr. 1673* (SP). São Paulo: Itararé, 14-XI-1994, VC Souza 7280 (SP). Santa Catarina: Curitibanos, 17-III-1984, G Hashimoto 9272 (SP).
Camarea affinis A.St.-Hil.: BRAZIL. Minas Gerais: Itabirito, 1-II-1995, Teixeira s.n.* (SP 291071); Joaquim Felício, 26-I-2004, JR Pirani 5289 (SP). São Paulo: Pedregulho, 15-II-2004, R Sebastiani 47 (SP).
Camarea ericoides A.St.-Hil.: BRAZIL. Goiás: Campo Alegre de Goiás, 8-IX-1998, VC Souza 21323* (SP); Minacu, 9-X-1991, TB Cavalcanti 871 (SP). Minas Gerais: Gouvêia, 25-III-1984, TM Cerati CFCR 4248 (SP); São Roque de Minas, 8-XII-1994, R Romero 1511 (SP).
Cottsia californica (Benth.) W. R. Anderson & C. Davis: MEXICO. Baja California: Constitution, 22-X-2001, JP Rebman 7705* (RSA); Picachos de Santa Clara, 5-10-XI-1947, HS Gentry 7692 (RSA); Paraje Los Chinos, 13-X-1994, TF Daniel 6831 (MEXU).
Cottsia gracilis (A.Gray) W. R. Anderson & C. Davis: UNITED STATES OF AMERICA. Arizona: Manicopa, 17-IV-1962, PH Raven 17374* (SP); Manicopa, 16-X-1999, LR Landrun 9588 (MBM); Yavapai, 21-IV-2000, LR Landrun 9717 (MBM).
Cottsia linearis (Wiggins) W. R. Anderson & C. Davis: MEXICO. Sonora: Navajoa, 5-XI-1939, HS Gentry 4883* (MEXU); Hermosillo, 12-IV-1992, A Búrquez 92-317 (MEXU).
Janusia anisandra (A. Juss.) Griseb.: BRAZIL. Minas Gerais: Januária, 23-V-1997, JA Lombardi 1684* (SP). Bahia: Abaíra, 13-III-1992, B Stannard 51953 (SP); Abaíra, 9-VII-1994, W Ganev 3480 (SP).
Janusia caudata (A.Juss.) Griseb.: BRAZIL. Maranhão: Cururupu, VIII-1914, A Lisboa 74* (RB). Piauí: Buriti dos Lopes, 22-VI-1972, D Sucre 9235 (RB); Buriti dos Lopes, 16-VII-2002, ASF Castro 1254 (SPF).
Janusia christianeae W. R. Anderson: BRAZIL. Bahia: Barreiras, 11-VI-1992, AM Carvalho et al. 3993* (SP).
Janusia guaranitica (A.St-Hil.) A.Juss.: BRAZIL. São Paulo: Paranapanema, 31-III-2008, R Sebastiani 315* (SP) (chasmogamous flowers). Mato Grosso do Sul: Aquidauana, 30-V-2008, R Sebastiani 326 (SP) (chasmogamous and cleistogamous flowers). São Paulo: Santo Antônio da Posse, 25-II-1976 GJ Shepherd 11264 (UEC) (chasmogamous flowers).
Janusia hexandra (Vell.) W. R. Anderson: BRAZIL. Bahia: Almadina, 4-IV-1997, WW Thomas 11423* (SP). Espírito Santo: São Mateus, 15-V-1977, G Martinelli 2064 (RB); Linhares, III-1986, M Sobral 4746 (SP).
Janusia janusioides (A.Juss.) W. R. Anderson: BRAZIL. Mato Grosso do Sul: Corumbá, 2-IV-2003, VJ Pott 6154* (SP). Mato Grosso: Poconé, 14-II-1990, A Pott 5532 (SP). Tocantins: Palmas, 13-II-2001, M Alves 2198 (SP).
Janusia lindmanii (Skottsb.) W. R. Anderson: BRAZIL. Goiás: Colinas do Sul, 12-III-1992, TB Cavalcanti 1214* (RB); Aragarças, 25-II-1982, WR Anderson 12452 (MBM). Mato Grosso: Rondonópolis, 10-II-1975, WR Anderson 11388 (MBM).
Janusia linearifolia A.Juss.: ARGENTINA. Misiones: San Ignacio, 23-IX-1999, F Biganzoli 613* (MBM); BRAZIL. Mato Grosso do Sul: Bonito, 13-XI-2002, G Hatschbach 74186 (MBM). Paraná: Ponta Grossa, 3-X-1928, FC Hoehne s.n. (SP 23350).
Janusia malmeana (Nied.) W. R. Anderson: BRAZIL. Goiás: Niquelândia, 26-IV-1995, FCA Oliveira 328* (SP).
Janusia mediterranea (Vell.) W. R. Anderson: BRAZIL. São Paulo: Jundiaí, 30-I-2008, R Sebastiani 306* (SP). Mato Grosso: Cuiabá, 11-II-1975, WR Anderson 11332 (SP). Minas Gerais: Entre Rios de Minas, II-1970, PL Krieger 7942 (SP).
Janusia occhionii W. R. Anderson: BRAZIL. São Paulo: Avaré, 8-III-2008, R Sebastiani 309* (SP); Avaré, 8-III-2008, R Sebastiani 308 (SP); Assis, 20-XII-1995, VC Souza 9724 (SP).
Janusia paraensis R.Sebast. & Mamede: BRAZIL. Pará: Tucurui, 5-XI-1979, MFF Silva 45* (UFMT); Tucurui, 12-V-1978, MG Silva 3524 (RB); BRAZIL. Pará: Tucurui, 29-I-1980, PLB Lisboa 1254 (SP).
Janusia prancei W. R. Anderson: BRAZIL. Amazonas: Humaitá, 23-VIII-1976, FN Chagas 6768* (UEC); Canutama, 23-VII-2007, AL Silveira 86 (UEC). Rondônia: Ouro Preto do Oeste, 13-VII-1986, J Augusto 1794 (R).
Janusia schwannioides W. R. Anderson: BRAZIL. Bahia: Poções, 8-III-1982, WR Anderson 12514* (SP); Poções, 29-VI-2003, G Hatschbach 75881 (MBM); Caeté, 19-II-1992, AM Carvalho 3772 (SP).
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Sebastiani, R., Cruz-Barros, M.A.V. & da Silva Corrêa, A.M. Palynological study of Janusia A. Juss. and related genera (Malpighiaceae). Braz. J. Bot 37, 543–559 (2014). https://doi.org/10.1007/s40415-014-0082-1
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DOI: https://doi.org/10.1007/s40415-014-0082-1