Cyperus conglomeratus Rottb.

First published in Descr. Icon. Rar. Pl.: 21 (1773)
This species is accepted
The native range of this species is W. Tropical Africa to NW. India and W. Indian Ocean. It is a perennial or rhizomatous geophyte and grows primarily in the subtropical biome.

Descriptions

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

Morphology General Habit
Tufted plant with woolly roots
Morphology Leaves Leaf sheaths
Pale, papery leaf sheaths
Morphology Leaves
Stiff leaves and bracts
Morphology Reproductive morphology Inflorescences
Spherical clusters of generally pale spikelets
Ecology
Sandy places.
[FWTA]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Slender to very robust tussocky perennial with a short woody rhizome and numerous c. 0.5 mm thick wiry roots that are often covered by a thick greyish tomentum and then c. 2 mm thick
Morphology Stem
Stems 1–40 (rarely to 120) cm long and c. 1–4 mm thick, triangular to almost terete, glabrous
Morphology Leaves
Leaves many, from the basal 3–15 cm only; sheaths rather thin, grey to reddish brown, the lower sometimes splitting up into reddish brown fibres; blades 5–25 cm long and 1–3 mm wide, often rather thick, weakly or strongly curved, sometimes folded as dry
Morphology Reproductive morphology Inflorescences
Inflorescence a terminal head of 3–50 crowded spikelets usually 3–5 cm in diam., but often subtended by 1–8 new heads or groups of spikelets on 1–6 cm long peduncles; involucral bracts 1–5, leafy, erect or spreading, the largest 1–25 cm long, usually overtopping the inflorescence
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 5–30 x 2–4 mm, lanceolate, compressed or subterete, greyish white or variegated grey and reddish brown, 10–50-flowered
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 2.5–4 mm long, ovate, greyish white to brown or reddish brown, many-nerved, but the nerves sometimes indistinct; midrib often green and excurrent into a short straight awn
Morphology Reproductive morphology Flowers Gynoecium Style
Style 3-branched
Morphology Reproductive morphology Fruits
Nutlet c. 1.5 x 0.8–1 mm, obovate, obscurely triangular, blackish, minutely papillose.
Distribution
N1–3; C1; S2, 3 widespread in dry and hot parts of Africa and western Asia.
Ecology
Near sea-level to 800 m.
[FSOM]

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

Type
Type: Arabia, Gorab & Ghunsudam, Forsskahl s.n. (C, holo.)
Note
Haines & Lye: “in East Africa only known from a very young specimen from northern Kenya.” They do not cite this specimen. The species is otherwise known from drier northern Africa and from Senegal to Somalia, so it is possible that it does occur in our area; as there seem to be no authenticated specimens, I place it in ‘species of uncertain occurrence’.
[FTEA]

Sources

  • Flora of Somalia

    • Flora of Somalia
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • 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 Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 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 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Science Photographs

    • Copyright applied to individual images