Putranjivaceae
Drypetes

Drypetes calvescens Pax & K.Hoffm.

First published in H.G.A.Engler (ed.), Pflanzenr., IV, 147, XV: 276 (1922)
This species is accepted
The native range of this species is W. Central Tropical Africa to Uganda. It is a tree and grows primarily in the wet 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: not threatened. Confidence: confident
[AERP]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/174410896/174513635

Conservation
LC - least concern
[IUCN]

Euphorbiaceae, A. R.-Smith. Flora of Tropical East Africa. 1987

Morphology General Habit
A small tree up to 7.5 m.
Morphology General Shoots
Young shoots and petioles minutely fulvous-puberulous at first, soon glabrescent.
Morphology Leaves
Petioles 3–4(–7) mm. long; leaf-blade oblong-oblanceolate to elliptic-lanceolate, 8–12(–16) cm. long, 3–4(–6) cm. wide, obtusely acuminate, slightly asymmetrically cuneate, very shallowly crenate-serrate to subentire, thinly coriaceous, lateral nerves 6–8 pairs, looped within the margin, tertiary nerves reticulate, only very slightly prominent above and beneath, sparingly pubescent on the midrib above and beneath at first, soon glabrescent.
Morphology Leaves Stipules
Stipules triangular, 0.7 mm. long, pubescent, soon falling.
Morphology Reproductive morphology Flowers
Flowers axillary, fasciculate. Male flowers several per cluster; pedicels up to 5 mm. long, pubescent; sepals 4, ovate-suborbicular, 2 mm. long, 1.5 mm. wide, sparingly pubescent without, glabrous within, cream-coloured; stamens 4, 3 mm. long, anthers 1 mm. long; disc small, ± 2 mm. diameter, lobulate and plicate around the margin, smooth, with a conical central projection, glabrous. Female flowers 2–4 per cluster; pedicels as in the ♂; sepals 4, suborbicular, 3 mm. long, 2.5–3 mm. wide; disc larger than in the ♂ flowers, flat, entire, glabrous; ovary 2-locular, pubescent; styles 2, linear; stigmas broadened and somewhat bifid at the apex.
sex Male
Male flowers several per cluster; pedicels up to 5 mm. long, pubescent; sepals 4, ovate-suborbicular, 2 mm. long, 1.5 mm. wide, sparingly pubescent without, glabrous within, cream-coloured; stamens 4, 3 mm. long, anthers 1 mm. long; disc small, ± 2 mm. diameter, lobulate and plicate around the margin, smooth, with a conical central projection, glabrous.
sex Female
Female flowers 2–4 per cluster; pedicels as in the ♂; sepals 4, suborbicular, 3 mm. long, 2.5–3 mm. wide; disc larger than in the ♂ flowers, flat, entire, glabrous; ovary 2-locular, pubescent; styles 2, linear; stigmas broadened and somewhat bifid at the apex.
Morphology Reproductive morphology Seeds
Mature fruit not known.
Habitat
Rain-forest; 1200 m.
Distribution
U4
[FTEA]

Sources

  • Angiosperm Extinction Risk Predictions v1

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

  • Flora of Tropical East Africa

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

  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. 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 2025. 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