Rubiaceae
Rothmannia

Rothmannia longiflora Salisb.

First published in Parad. Lond. 1: t. 65 (1807)
This species is accepted
The native range of this species is Tropical Africa. It is a shrub or tree and grows primarily in the wet tropical biome.

Descriptions

Rubiaceae, F. N. Hepper & R. W. J. Keay. Flora of West Tropical Africa 2. 1963

Morphology General Habit
A shrub or small tree, up to 15 ft. high
Morphology Leaves
Shiny foliage, often much-branched
Morphology Reproductive morphology Flowers
Flowers more or less erect, corolla greenish or reddish outside, the lobes white with purplish or reddish markings within
Ecology
Mostly in forest regrowth vegetation.
[FWTA]

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]

Rubiaceae, B. Verdcourt. Flora of Tropical East Africa. 1976

Morphology General Habit
Bush or small tree 3–8.4(–9) m. tall, often climbing; young branches glabrous.
Morphology Leaves
Leaves glabrous; blades elliptic or sometimes broadly elliptic, 6–14(–18) cm. long, (2.2–)2.5–5.8(–7.8) cm. wide, apex acuminate, base acute; domatia present; petioles 0.3–0.8(–1) cm. long; stipules triangular, ± 3 mm. long, acuminate, early caducous.
Morphology Reproductive morphology Flowers
Flowers sweetly scented, solitary, terminal on short branches above a single leaf; peduncle (0.3–)0.4–1 cm. long, bearing ± 5–9 scale-like, ciliate bracteoles.
Morphology Reproductive morphology Flowers Calyx
Calyx glabrous outside; tube 0.5–0.8(–1) cm. long; limb-tube (0.5–)0.7–1 cm. long, wider than the tube; lobes very shortly triangular or linear, 1–2(–4) mm. long.
Morphology Reproductive morphology Flowers Corolla
Corolla purple to green outside, whitish, often with purple spots inside, finely pubescent outside; tube narrowly cylindrical below, funnel-shaped above, (?4.4–)14–18(–24) cm. long, the funnel-shaped portion 3.8–4(–5.5) cm. long, 1.2–4.2 cm. wide at top, 0.2–0.4 cm. wide at base, with lines of pubescence in cylindrical portion inside; lobes overlapping to the left in bud, ovate, (1–)1.3–2.5(–4) cm. long, (0.9–)1.2–1.7 cm. wide, obtuse, greyish tomentose above.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers included or with tips exserted, 2.7–3(–3.5) cm. long.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Style 12–21.2 cm. long, gradually widened towards apex; stigma partly exserted, (1.5–)2–2.9 cm. long, (0.2–)0.4–0.5 cm. wide.
Morphology Reproductive morphology Fruits
Fruit ? green, drying blackish, globose to ellipsoid, 3.5–5.2(–7) cm. long, with 10 indistinct ribs, glabrous, the calyx-limb persistent.
Morphology Reproductive morphology Seeds
Seeds brownish, 6–8 mm. long, 5–6 mm. wide, 1–1.5 mm. thick.
Habitat
Forest or woodland; 900–1200(–1675) m.
Distribution
K5 T4 U2 U4 also throughout W. tropical Africa, Zaire, Sudan and Angola
[FTEA]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/153937774/153937776

Conservation
LC - least concern
[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

  • Flora of West Tropical Africa

    • Flora of West Tropical 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

  • 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

  • Kew Science Photographs

    • Copyright applied to individual images