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This species is accepted, and its native range is SE. Kenya.
A specimen from Kew's Herbarium

[FTEA]

Cyperaceae, K Hoenselaar, B. Verdcourt & H. Beentje. Hypolytrum, D Simpson. Fuirena, M Muasya. Flora of Tropical East Africa. 2010

Type
Type: Kenya, Kwale District: 4 km E of Kinango, Lye 6288 (EA, holo.; K!, iso.)
Morphology General Habit
Tufted annual 5–20 tall, glabrous.
Morphology Roots
Root system small
Morphology Leaves
Leaves many, 1–10 cm long, almost filiform, scabrid.
Morphology Leaves Leaf sheaths
Sheaths straw-coloured to light reddish-brown, hairy to glabrous and with long flexuous hairs at the mouth
Morphology Reproductive morphology Inflorescences
Inflorescence 0.5–2.5 cm wide, of 1 sessile and 1–6 pedunculate spikelets and sometimes with an additional stalked spikelet from the base of 1–2 of the pedunculate spikelets.
Morphology Reproductive morphology Inflorescences Bracts
Bracts reddish brown with subulate green leafy tip of up to 2 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets ovoid, 3–6 mm long, 2–4 mm wide, often with spreading glumes which are light reddish brown with green or straw-coloured midrib, ovate, 2–2.3 mm long, densely shortly hairy
Morphology Reproductive morphology Fruits
Nutlets yellowish brown to grey, obovoid with 3 distinct angles, 0.7–0.8 mm long, 0.4–0.5 mm wide, with or without a darker persistent style base; sculpture reticulate, transversely wrinkled with elongate strongly sinuous cells and on the angles some cells wider than long.
Ecology
Seasonally wet seepage grassland with scattered trees; 80–300 m
Note
Two further specimens from further north on the Kenya coast are, I believe, also this species – Tana River District: 48 km S of Garsen, Kurawa, 20 Sept. 1951, Polhill & Paulo 514 at 15 m in Dobera, Acacia, Hyphaene scattered tree grassland; and Lamu District: Boni Forest, Mararani, 4 Sept. 1961, Gillespie 270. They are more robust, 30–40 cm tall, with broader leaves and nutlets much darker when adult.
Distribution
Flora districts: K7 Range: Not known elsewhere

Native to:

Kenya

Bulbostylis afroorientalis (Lye) R.W.Haines appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Lye, K.A. [6288], Kenya K000416750

First published in R.W.Haines & K.A.Lye, Sedges & Rushes E. Afr., App. 3: 1 (1983)

Accepted by

  • Govaerts, R. & Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges: 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.
  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.

Literature

Flora of Tropical East Africa

  • Sedges & Rushes E. Afr. App. 3: 1 (1983) main work: 111, fig. 201, 202 (1983).

Flora of Tropical East Africa
Flora of Tropical East 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/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0