Acanthaceae
Thunbergia

Thunbergia mildbraediana Lebrun & L.Touss.

First published in Bull. Jard. Bot. État Bruxelles 17: 85 (1943)
This species is accepted
The native range of this species is E. DR Congo to SW. Uganda. It is a climbing perennial and grows primarily in the wet tropical biome.

Descriptions

Acanthaceae (part 1), Kaj Vollesen, Flora of Tropical East Africa, 2008

Morphology General Habit
Herbaceous twiner; stems to 2 m long, pilose or sparsely so, densest in two bands.
Morphology Leaves
Leaves with petiole not winged, 2–6 cm long, indumentum as stems; lamina triangular-ovate in outline, largest 4.5–10.5 × 2–5.5 cm, apex acuminate, base deeply cordate, with sagittate lobes, margin subentire to coarsely dentate; subglabrous to sparsely pilose, below densest on veins, above uniformly.
Morphology Reproductive morphology Flowers
Flowers axillary, solitary; pedicels (2–)4–9 cm long, subglabrous to sparsely pilose; bracteoles green with conspicuous main veins and reticulation, ovate or narrowly so, 2.7–3.5 × 1.1–1.8 cm, acute to acuminate, cordate and distinctly 4-angular at base, subglabrous to sparsely pilose, densest along edges and veins.
Morphology Reproductive morphology Flowers Calyx
Calyx puberulous with stalked capitate glands only or with intermixed hairs (rarely with hairs only), rim 1–2 mm high, segments linear, 3–6 mm long.
Morphology Reproductive morphology Flowers Corolla
Corolla white with reddish-purple throat (? rarely pale yellow); cylindric tube (5–)8–12 mm long; throat straight or slightly curved, campanulate, 1.3–2.5 cm long and 1–1.5 cm in diameter apically; lobes 1–2.2 × 1–2.4 cm, deeply emarginate.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 5–8 mm long; anthers ± 3 mm long, rounded or indistinctly apiculate, densely bearded at base and about half way up one side; spurs 2–2.5 mm long.
Morphology Reproductive morphology Fruits
Capsule glabrous, depressed globose, 9–12 × 11–14 mm, beak 13–25 mm long, parallel-sided or slightly constricted at base.
Morphology Reproductive morphology Seeds
Seed dark brown, ± 7 mm in diameter, lamellate at edges, reticulate towards centre.
Distribution
Range: Tanzania. Range: Congo-Kinshasa, Rwanda, Burundi Flora districts: U2 T4 Range: Uganda. Range: Congo-Kinshasa, Rwanda, Burundi
Ecology
Evergreen montane forest, often in the bamboo zone, secondary forest at lake level; (750–)2250–2600 m
[FTEA]

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/103647349/103648597

Conservation
NT - near threatened
[IUCN]

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