Convolvulaceae
Ipomoea

Ipomoea trinervia Schulze-Menz

First published in Notizbl. Bot. Gart. Berlin-Dahlem 14: 109 (1938)
This species is accepted
The native range of this species is Tanzania to Malawi. It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: threatened. Confidence: low confidence
[AERP]

Convolvulaceae, Maria Leonor Gonçalves. Flora Zambesiaca 8:1. 1987

Morphology General Habit
Annual herb.
Morphology Stem
Stems erect or decumbent, pubescent.
Morphology Leaves
Leaf lamina obovate or spathulate up to 7 × 6 cm., pubescent, with apical part elliptic to orbicular up to 5 × 6 cm., acute at the apex, obscurely crenulate and a basal part narrowly cuneate, 2 × 0·7–1·5 cm.; petiole about 1 cm. long.
Morphology Reproductive morphology Inflorescences
Inflorescence an umbel-like cyme of more or less 6 flowers clustered; peduncle up to 2 cm. long, often much shorter, pubescent; pedicels 6 mm. long, pubescent; bracts linear-oblong, rounded at the apex, 3 mm. long, more or less 3-nerved, pubescent.
Morphology Reproductive morphology Flowers Calyx
Sepals linear-oblong, 5·5–9 mm. long, emarginate, conspicuously 3-nerved, shortly pubescent.
Morphology Reproductive morphology Flowers Corolla
Corolla trumpet-shaped, white, 2 cm. long, with narrow tube.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary elongate-conic, shortly pubescent.
Morphology Reproductive morphology Fruits
Capsule elongate-ovoid tipped by the persistent style, coriaceous, slightly pubescent.
Morphology Reproductive morphology Seeds
Seeds black, somewhat obscurely tuberculate, sparsely pubescent with long hairs.
[FZ]

Convolvulaceae, B. Verdcourt (East African Herbarium). Flora of Tropical East Africa. 1963

Morphology General Habit
Annual herb; stems erect or decumbent, up to 45 cm. high, pubescent.
Morphology Leaves
Leaf-blade pubescent, obovate or spathulate; apical part elliptic to orbicular, 4.7–5.5 cm. long, 3.7–4.8 cm. wide, ± acute at the apex, obscurely crenulate; basal part narrowly cuneate, 2 cm. long, 0.7–1.5 cm. wide at the apex; petiole about 1 cm. long.
Morphology Reproductive morphology Inflorescences
Peduncle up to 2 cm. long, often much shorter; inflorescence ± 6-flowered, the flowers clustered in an umbel-like cyme; bracts pubescent, ± 3-nerved, 3 mm. long, 1.5 mm. wide; pedicels 6 mm. long.
Morphology Reproductive morphology Flowers Calyx
Sepals linear-oblong, 5.5–9 mm. long, 2.5–3.5 mm. wide, obtuse, conspicuously 3-nerved.
Morphology Reproductive morphology Flowers Corolla
Corolla white, trumpet-shaped; tube narrow, 13 mm. long, 1.5–3 mm. wide; limb 7 mm. long.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary elongate-conic, 2.5 mm. long, 1 mm. wide, shortly pubescent.
Morphology Reproductive morphology Fruits
Capsule elongate-ovoid, 9–10 mm. long, slightly pubescent.
Morphology Reproductive morphology Seeds
Seeds black, somewhat obscurely tuberculate, sparsely pubescent with long hairs.
Habitat
Grassland, becoming a weed of sandy cultivated land; 600–660 m.
Distribution
T8 not known elsewhere
[FTEA]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0