Fabaceae
Eriosema

Eriosema arachnoideum Verdc.

First published in Kew Bull. 25: 141 (1971)
This species is accepted
The native range of this species is Tanzania. It grows primarily in the seasonally dry tropical biome.

Descriptions

International Legume Database and Information Service

Conservation
Insufficiently known
Ecology
Africa: Afromontane grassland
Morphology General Habit
Perennial, Not climbing, Herb
[ILDIS]

Leguminosae, J. B. Gillett, R. M. Polhill & B. Verdcourt. Flora of Tropical East Africa. 1971

Morphology General Habit
Perennial herb with 1–several erect sparingly branched stems ± 25 cm. tall from a woody rootstock.
Morphology Stem
Stems pubescent and also pilose with ± spreading white hairs.
Morphology Leaves
Leaflets 3, narrowly elliptic-lanceolate, 1·2–5 cm. long, 2–8 mm. wide, acute at the apex, cuneate, pilose with long white hairs and with shorter pubescence, glandular beneath; margins inrolled; petiole 2–9 mm. long; rhachis 2–5 mm. long; petiolules 0·5 mm. long; stipules green, linear-lanceolate, 0·7–1·5 cm. long, 1·5 mm. wide, pilose.
Morphology Reproductive morphology Inflorescences
Racemes axillary and terminal, the flowering part 1·5–3 cm. long, ± 2 cm. wide; peduncle 2–5 cm. long, with both short and long hairs; pedicels ± 2 mm. long; bracts linear, 7–10 mm. long, 0·7 mm. wide, pilose.
Morphology Reproductive morphology Flowers Calyx
Calyx pilose and glandular, ± 6 mm. long; lobes narrowly triangular, slightly longer than the tube.
Morphology Reproductive morphology Flowers Corolla
Standard reddish-brown outside, flesh-coloured inside with maroon veins, obovate, 1·1 cm. long, 6–7 mm. wide, emarginate, pubescent and densely glandular; wings cream; keel pale yellow-green, densely glandular and with a row of hairs along the lower margin.
Morphology Reproductive morphology Fruits
Pods oval-oblong, 1·1 cm. long, 7 mm. wide, covered with short hairs, sparse glands and long hairs ± 2·5 mm. long.
Morphology Reproductive morphology Seeds
Seeds pale yellowish-buff, ellipsoid, longest dimension ± 3 mm., shorter dimension 2·2 mm., 1·5 mm. thick; rim-aril yellowish.
Habitat
Upland grassland, sometimes in damp places; 1800–1900 m.
Distribution
T7
[FTEA]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/179643/1585096

Conservation
EN - endangered
[IUCN]

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: confident
[AERP]

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

    • 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

  • International Legume Database and Information Service

    • International Legume Database and Information Service (ILDIS) V10.39 Nov 2011
    • 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

  • World Checklist of Vascular plants (WCVP)

    • 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