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This species is accepted, and its native range is Tropical & S. Africa.
A specimen from Kew's Herbarium

[FWTA]

Cyperaceae, Miss S. S. Hooper. Flora of West Tropical Africa 3:2. 1972

Vegetative Multiplication Rhizomes
Characterised by the seriate rhizome composed of swollen stem bases covered by reddish scales
Morphology Reproductive morphology Inflorescences
Also characterized by the few dark spikelets with, when flowering, very conspicuous anthers
Ecology
Upland grassland, often on bare rock.

[FTEA]

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

Type
Type: Angola, Golungo Alto, mountains E of Quilombo, Sobato Quilombo, Welwitsch 7016 & slope of Queta Mt, Welwitsch 7020 (LISU, syn.; BM, K, isosyn.)
Morphology General Habit
Slender perennial 3–40 cm tall with rhizome composed of characteristic confluent swollen stem bases.
Morphology Stem
Stem 0.3–0.5 mm thick with many white spreading hairs 0.2–0.4 mm long below but almost glabrous above
Morphology Leaves
Leaves 2–6 cm long, 0.2–0.5 mm wide, flat, usually densely hairy.
Morphology Leaves Leaf sheaths
Sheaths grey to reddish or golden brown, glabrous or pubescent and few to many flexuous hairs at the throat
Morphology Reproductive morphology Inflorescences
Inflorescence with 3(–10**) spikelets (** Lye gives ‘fide Napper’ but I cannot find any mention of this species by her), one sessile surrounded by 1–2 stalked ones.
Morphology Reproductive morphology Inflorescences Bracts
Bracts shorter than, or 2–3 × as long as, the sessile spikelet.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 4–8 mm long, 2 mm wide.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dark reddish brown or blackish with paler midrib, subulate or acuminate at the apex, pubescent and with short marginal hairs
Morphology Reproductive morphology Fruits
Nutlets pale brown, rounded obovoid, 1.2 mm long, 1 mm wide, wrinkled and with close microscopic ribbing.
Morphology Reproductive morphology Flowers Gynoecium Style
Style base flattened, persistent.
Ecology
Burnt grassland, grassy hillsides, wooded grassland, shallow rocky soil, dried-up swamps, roadsides, mostly dry places; 1150–2400 m
Note
C.B. Clarke annotated Scott Elliot 8047 as B. uniseriata sp. nov. but this was not published and later he thought it was B. trichobasis. The name has appeared in literature e.g. De Wildem. in Pl. Bequaert. 4: 198 (1927) “as uniseriata as a variety” and Brodard in Ann. Fac. Sci. Univ. Dakar 9: 70 (1963), but has never been validated. The specific epithet probably means ‘mountain-bred’.
Distribution
Flora districts: U1 U2 U3 U4 K (fide Haines & Lye); T1 T3 T4 T7 Range: Guinea to Cameroon, Congo-Kinshasa, Rwanda, Angola, South Africa

Native to:

Angola, Burundi, Cameroon, Cape Provinces, Congo, Free State, Gabon, Guinea, Kenya, KwaZulu-Natal, Lesotho, Malawi, Nigeria, Northern Provinces, Rwanda, Sierra Leone, Sudan, Swaziland, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

Bulbostylis oritrephes (Ridl.) C.B.Clarke appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1969 Jaeger, P. [986], Sierra Leone K000416709
Jan 1, 1969 Pitot, A. [25], Guinea K000416710
Jan 1, 1968 Peter, A. [22665], Tanzania K000416740 Unknown type material
Scott Elliot, G.F. [5244], Guinea K000416708 holotype
Scott Elliot, G.F. [8047], Uganda K000416739
Bidgood, S. [5203], Tanzania K000190431
Bidgood, S. [5056], Tanzania K000190284

First published in Trans. Linn. Soc. London, Bot. 4: 54 (1894)

Accepted by

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
  • 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.
  • Lye, K.A. & Thery, P. (2012). Flore du Gabon 44: 1-230. Muséum National D'Histoire Naturelle, Paris.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.
  • Strugnell, A.M. (2006). A checklist of the Spermatophytes of Mt. Mulanje, Malawi Scripta Botanica Belgica 34: 1-199.

Literature

Flora of West Tropical Africa

  • in Trans. Linn. Soc. ser. 2, 4: 54 (1894).

Kew Backbone Distributions

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.

Flora of Tropical East Africa

  • Ann. Fac. Sci. Univ. Dakar 9: 70 (1963), as orytrephes
  • Durand & Schinz, Consp. Fl. Afr. 5: 616 (1895)
  • F.T.A. 8: 445 (1902)
  • F.W.T.A. ed. 2, 3: 317 (1972)
  • Fl. Rwanda 4: 425 (1988)
  • Haines & Lye, Sedges & Rushes E. Afr.: 101, fig. 173, 174 (1983)
  • Rendle, Cat. Afr. Pl. Welw. 2: 125 (1899)
  • Strelitzia 2: 33, fig. 12A, D (1995).
  • Trans. Linn. Soc. ser. 2, 4: 54 (1894)

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/

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