Rubiaceae
Tricalysia

Tricalysia pedicellata Robbr.

First published in Bull. Jard. Bot. Natl. Belg. 57: 194 (1987)
This species is accepted
The native range of this species is E. Central Tanzania. It is a shrub and grows primarily in the seasonally dry tropical biome.

Descriptions

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

Morphology General Habit
Shrub or rarely a small tree 1.5–2.5 m. high; young twigs glabrous.
Morphology Leaves
Leaf-blades elliptic, more rarely ovate or obovate, (5–)8–16 cm. long, (2–)–3–6.5 cm. wide, acuminate at the apex, cuneate or rarely ± rounded at base, sparsely pubescent when young, later entirely glabrous, subcoriaceous; 3–5(–7) pairs of main lateral nerves; pocket-domatia tufted; petiole 5–10 mm. long, glabrous or with 2 lateral rows of hairs; stipules sheathing, ± 1.5 mm. long, with awns 1–2 mm. long.
Morphology Reproductive morphology Flowers
Flowers 6-merous, subsessile (but stalk elongating in fruit), in 3–several-flowered sessile inflorescences; bracts and bracteoles cupular, truncate or 2-apiculate, pubescent.
Morphology Reproductive morphology Flowers Calyx
Calyx-tube glabrous; limb cupular, 2 mm. long, showing deep longitudinal splits when the flower opens, pubescent outside.
Morphology Reproductive morphology Flowers Corolla
Corolla white, glabrous outside; tube 3.5 mm. long, 1.5 mm. wide, the upper half with sparse long hairs within; lobes 6.5 mm. long, 2.25 mm. wide, acute.
Morphology Reproductive morphology Flowers Androecium Stamens
Filaments 1.5 mm. long; anthers 3.5 mm. long, shortly apiculate, glabrous.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Placenta with 2 collateral ovules; style glabrous, ± 10 mm. long including ± 2 mm. long lobes.
Morphology Reproductive morphology Fruits
Fruit red, ± spherical, ± 8 mm. in diameter, borne on long and slender pedicels (elongated in fruiting stage only, developed above the bracteolar cup) up to 30 mm. long.
Morphology Reproductive morphology Seeds
Seeds 1 or 2 in each chamber, 1/2- or 1/4-spherical; hilum oblong, wide; seed-coat ± smooth.
Habitat
Forest; 300–700 m.
Distribution
T6 not known elsewhere
[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: threatened. Confidence: confident
[AERP]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/35493/9932013

Conservation
VU - vulnerable
[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