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This species is accepted, and its native range is Eritrea to Zambia, Asia to Australia.
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: “India orientalis” in Vahl, ex Herb. Lamarck (P-LA, holo.)
Morphology General Habit
Annual or short-lived perennial.
Morphology Culms
Culms tufted, 21–65 cm long, 0.8–2.5 mm wide, trigonous to sometimes triquetrous, smooth, lower part with several nodes
Morphology Leaves
Leaves up to 27 cm long. Leaf sheath yellowish brown to green to sometimes reddish, 2.8–10.7 cm long. Leaf blade narrowly linear, flattish or plicate, 8–17 cm long, 1–4 mm wide, acuminate to acute, sometimes ± scabrid
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 3–5. Leaf-like, spreading, lowermost 7.4–18.5 cm long, 1.4–3.8 mm wide, often ± scabrid
Morphology Reproductive morphology Inflorescences
Inflorescence ± capitate or simple; primary branches (0–)3–5, 1–3.3 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets crowded in digitate, ovoid clusters, sessile or at the end of primary branches. Spikelets 3–20 per cluster, narrowly oblong-ovoid, 8–18 mm long, 2–2.8 mm wide, axis straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes pale brown to reddish- or purplish-brown, broadly ovate (sometimes ± obovate), 2.1–2.2 mm long, 0.9–1.8 mm wide, keel rather broad, often distinctly furrowed on both sides of keel, 3–5-veined, green, apex obtuse
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 1.3–2.4 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.5–1 mm long
Morphology Reproductive morphology Flowers Gynoecium Style
Style 2-branched
Morphology Reproductive morphology Fruits
Nutlets grey-black, broadly obovoid, 1.5–2.2 mm long, 0.9–1.8 mm wide, minutely papillose-punctuate to ± wrinkled, sometimes ± glaucous
Ecology
Along streams, in riverbeds, ditches and waterholes, wet grassland, or on thin soil over rocks; 950–1800 m
Conservation
Least concern (LC) due to its wide distribution
Note
The combination by Nees in Linnaea 9: 283 (1835) was not validly published. In “The Sedges and Rushes of East Africa” (1983) Lye recognizes two subspecies within P. sanguinolentus, subsp. sanguinolentus and subsp. nairobiensis. The latter was based on having a slender culm, narrow spikelets and leaves, and wrinkled nut; these characters do not seem to be consistent, and the subspecies are not recognized here.
Distribution
Flora districts: K1 K3 K4 K 6T1 T2 T4 T5 T7 Range: Eritrea, Ethiopia, Zambia; Mediterranean, Asia, Australia

Native to:

Afghanistan, Amur, Andaman Is., Assam, Bangladesh, Borneo, China North-Central, China South-Central, China Southeast, East Himalaya, Eritrea, Ethiopia, Hainan, India, Inner Mongolia, Iran, Japan, Jawa, Kazakhstan, Kazan-retto, Kenya, Kirgizstan, Korea, Lesser Sunda Is., Malaya, Maluku, Manchuria, Myanmar, Nansei-shoto, Nepal, New Guinea, New South Wales, Nicobar Is., Ogasawara-shoto, Pakistan, Philippines, Primorye, Qinghai, Queensland, Saudi Arabia, South Australia, Sri Lanka, Sulawesi, Sumatera, Tadzhikistan, Taiwan, Tanzania, Tasmania, Thailand, Tibet, Transcaucasus, Turkey, Turkmenistan, Uzbekistan, Victoria, Vietnam, West Himalaya, Xinjiang, Yemen, Zambia

Introduced into:

Alabama, Georgia, Hawaii, Louisiana, Mississippi, Réunion, St.Helena

Cyperus sanguinolentus Vahl appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Sep 1, 1989 Cleland, J.B. [s.n.], Australia K000309537 isotype
Brown, R. [5896], Australia K000309538
s.coll. [11], Australia K000309541
Brown, R. [5896], Australia K000309539
Stuart, C. [s.n.], Australia K000309540
May 1, 2005 Lye, K.A. [6379], Kenya Pycreus sanguinolentus K000362997 isotype
Feb 1, 1893 s.coll. [5760], Pakistan Pycreus sanguinolentus K000592580 Unknown type material
Feb 1, 1893 Maack, R.K. [s.n.] Pycreus sanguinolentus K000881593
Bidgood, S. [6332], Tanzania Pycreus sanguinolentus K000468093
Bidgood, S. [6149], Tanzania Pycreus sanguinolentus K000468276
Bidgood, S. [6140], Tanzania Pycreus sanguinolentus K000468285
Larsen, K. [34254], Thailand Pycreus sanguinolentus K000595116
Bidgood, S. [6368], Tanzania Pycreus sanguinolentus K000468057
Simpson, D. [1567], Thailand Pycreus sanguinolentus K000595119
Larsen, K. [34512], Thailand Pycreus sanguinolentus K000595115
Kerr, A.F.G. [21364], Thailand Pycreus sanguinolentus K000595118
Shimizu, T. [T11391], Thailand Pycreus sanguinolentus K000595117
Simpson, D. [1729], Thailand Pycreus sanguinolentus K000595120

First published in Enum. Pl. Obs. 2: 351 (1805)

Accepted by

  • Middleton, D.J. & al. (eds.) (2019). Flora of Singapore 7: 1-525. Singapore Botanic Gardens.

Not 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. [Cited as Pycreus sanguinolentus.]
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Pycreus sanguinolentus.]

Literature

Kew Backbone Distributions

  • Amini Rad, M. (2005). New records and interesting species of Cyperaceae family from Iran Iranian Journal of Botany 11: 49-53.
  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.
  • Marais, W. & Araujo, A.C. (2018). Flore des Mascareignes 202: 1-99. IRD Éditions, MSIRI, RBG-Kew, Paris.
  • Pandey, R.P. & Dilwakar, P.G. (2008). An integrated check-list flora of Andaman and Nicobar islands, India Journal of Economic and Taxonomic Botany 32: 403-500.
  • Walker, E.H. (1976). Flora of Okinawa and the southern Ryukyu islands: 1-1159. Smithsonian Institution Press, Washington D.C., U.S.A.
  • Wu, Z. & Raven, P.H. (eds.) (2010). Flora of China 23: 1-515. Missouri Botanical Garden Press, St. Louis.

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