Rubiaceae
Parapentas

Parapentas silvatica (K.Schum.) Bremek.

First published in Verh. Kon. Ned. Akad. Wetensch., Afd. Natuurk., Sect. 2, 48(2): 52 (1952)
This species is accepted
The native range of this species is E. Tanzania. It is a subshrub and grows primarily in the seasonally dry tropical biome.

Descriptions

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

Morphology General Habit
Stem straggling or prostrate, (0.15–)0.5–1 m. long, rooting at the nodes, the flowering shoots ascending to 10 cm., the younger parts with dense violet or ferruginous adpressed hairs, the older parts more sparsely pubescent.
Morphology Leaves
Leaf-blades ovate or elliptic-ovate, 0.6–8 cm. long, 0.5–4.8 cm. wide, obtuse to acute at the apex, very shortly mucronulate, gradually cuneate or rounded then narrowly cuneate at the base, sparsely to fairly densely adpressed pubescent above and beneath; petiole 0.3–4 cm. long, adpressed pubescent; stipule-sheath 1–2 mm. long, divided into 3–5 fimbriae, 2–5 mm. long; colleters mostly fairly evident.
Morphology Reproductive morphology Flowers
Flowers 1–3, axillary and terminal, opening one at a time, sessile, isostylous, both stamens and style exserted.
Morphology Reproductive morphology Flowers Calyx
Calyx-tube subglobose, 1.2–1.5 mm. long, pubescent; lobes linear-oblong or slightly spathulate, (1–)1.5–6 mm. long, 0.4–1.25 mm. wide, pubescent, the base sometimes triangularly widened in fruit and veined.
Morphology Reproductive morphology Flowers Corolla
Corolla white or bluish lilac or blue; tube 0.8–1.7 cm. long, pubescent or sometimes glabrescent outside; throat glabrous or somewhat hairy; lobes elliptic-oblong, (1.7–)4–7 mm. long, 0.6–2 mm. wide.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens exserted; filaments 2–4 mm. long.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Style slightly exserted to 2 mm. or only as long as the tube; stigma well exserted, 1.6–3 mm. long.
Morphology Reproductive morphology Fruits
Capsule oblong or obconic, 2–3.5 mm. long, 2.5–3 mm. wide, ribbed, speckled with dark resin patches, sparsely hairy; fruiting pedicels up to about 1.5 mm. long.
[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]

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.

  • 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