Cyperaceae
Bulbostylis

Bulbostylis longiradiata Goetgh.

First published in Bull. Jard. Bot. Natl. Belg. 55: 219 (1985)
This species is accepted
The native range of this species is Burundi to N. Zambia. It is an annual and grows primarily in the wet tropical biome.

Descriptions

J. Browning, K.D. Gordon-Gray†, M. Lock, H. Beentje, K. Vollesen, K. Bauters, C. Archer, I. Larridon, M. Xanthos, P. Vorster, J. Bruhl, K. Wilson and X. Zhang (2020). Flora Zambesiaca Volume: 14: Cyperaceae. M.Á. García, J.R. Timberlake (Eds). Kew Publish

Type
Burundi, Rumonge, 10.iii.1976, Reekmans 4844 (BR holotype, GENT).
Morphology General Habit
Delicate erect annual up to 35 cm tall; rhizome and tunic of leaf bases lacking
Morphology Leaves
Leaves numerous, occasionally equalling culm length; sheath mouth long white fringed, ligule 0; leaf blades 60–150 × 0.2–0.3 mm, filiform, inrolled when dry, margins hispidulous
Morphology Culms
Culms c. 0.4 mm wide, ridged and furrowed, hispid
Morphology Reproductive morphology Inflorescences
Inflorescence bisanthelate (branched to two orders), of central spikelet with 4–5 hispidulous inflorescence branches, 30–40 mm long, bearing spikelets; bracts 3–4, shorter than inflorescence branches, hispid, margins long white fringed
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 5–7(8) × 1.3–1.6 mm, acute
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes spiral, 2.5–2.8(3.5) × 1.4 mm, minutely scaberulous, light brown (cinnamon) with red-brown stripes, margins shortly fimbriolate, 3-nerved (central one green in life), lateral nerves prominent, apex mucronate to shortly apiculate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens (1)2–3
Morphology Reproductive morphology Flowers Gynoecium Style
Style glabrous, red brown basally, persistent on nutlet, branches 3, usually shorter than style
Morphology Reproductive morphology Fruits
Nutlet 1 × 0.7–0.8 mm, grey-brown, obovoid, subtrigonous, angles papillate, surface transversely wavy (8–10 waves not pronounced).
Distribution
Zambia. Also in D.R. Congo and Burundi.
Ecology
Brachystegia woodland; c. 1350 m.
Conservation
Restricted distribution in the Flora area; possibly threatened.
[FZ]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/103647833/103647835

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 Zambesiaca

    • Flora Zambesiaca
    • 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 2026. 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 2026. 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