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This species is accepted, and its native range is Kenya to S. Africa.
Pycreus chrysanthus (Boeckeler) C.B.Cl.

[FTEA]

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

Type
Type: Tanzania, without locality, Jaeger 62; Iringa District: Kidete, Peter 32801B; Dodoma District: Ugogo, near Bahi, Peter 33354 & Uyansi on Lake Chaya, Peter 34151 & 34253 & Itigi, Turu, Peter 33742 & Rift valley near Saranda, Peter 33638; Ufipa District: Unyanyembe, Malongwe, Peter 34453 (all B, syn.)
Morphology General Habit
Perennial up to 1 m high, slender to more robust, with long stolons.
Morphology Culms
Culms 36–77 cm long, 1.2–3.3 mm wide, trigonous, smooth
Morphology Leaves
Leaves up to 45 cm long. Leaf sheaths pale yellow-brown to brown, 2–10 cm long, often spongy. Leaf blade linear, plicate, 16–34 cm long, 2.6–7 mm wide, acute, apex almost glabrous to scabrid
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, 3–5, 11–39 cm long, 2.3–7 mm wide, spreading
Morphology Reproductive morphology Inflorescences
Inflorescence simple, slender to quite robust, primary branches 1–8, 1.1–15.5 cm long, at the base with a somewhat conspicuous tubular red-brown prophyll.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 5–13(23) per cluster, lanceolate, sometimes almost oblong, 13–35 mm long, 2.4–5 mm wide, axis straight or sometimes somewhat curved. Spikelets in clusters on elongated axis, sessile and at the end of primary branches.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes imbricate when young, spreading, sides slightly infolding and showing the nutlet during maturation, (pale) reddish-brown, sometimes almost purplish to almost black, elliptic-ovate, 2.6–4.2 mm long, 1.1–2.1 mm wide, keel acute, 2–3-veined, veins often yellow, apex acute to mucronate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 1.1–4 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1–2.2 mm long
Morphology Reproductive morphology Flowers Gynoecium Style
Style 2-branched
Morphology Reproductive morphology Fruits
Nutlet brown to grey, often shiny, obovoid, 1.3–1.6 mm long, 0.6–1 mm wide, almost glabrous to minutely papillose, papillae in longitudinal rows
Ecology
Wet depression in grassland, lake shores, bushland, sometimes on or at base of rocky outcrops; 900–1850 m
Conservation
Least concern (LC); although the distribution area is not large, the habitat is very common
Note
Lye described two subspecies for P. longistolon, subsp. longistolon and subsp. atrofusca, based on differences in size and colour of the spikelets. The spikelets of subsp. atrofusca are supposed to be slightly wider (3–5 mm in subsp. atrofusca and 2.5–3 mm in subsp. longistolon) and darker than in subsp. longistolon. I am unable to distinguish these in the material studied, and no subspecies are recognized here. This species is sometimes confused with Pycreus nitidus, but that is a more robust plant with the base of the plants massive, bearing scales and (old) leafbases. Also, the glumes of P. longistolon have a mucronate apex, while the apex of P. nitidus can vary from obtuse to acute. As mentioned in the description, the sides of the glumes of P. longistolon fold inwards during maturation of the nutlet, a character that is not shared with P. nitidus. This character is shared with P. pumilis var. patens; however this species is easily recognized by its small habit.
Distribution
Flora districts: K3 K4 T1 T2 T4 T5 T7 Range: Zambia

Native to:

Angola, Botswana, Cape Provinces, Free State, Kenya, Lesotho, Namibia, Northern Provinces, Swaziland, Tanzania, Zambia, Zimbabwe

Cyperus chrysanthus Boeckeler appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Feb 1, 1893 Drege [4409], South Africa Pycreus chrysanthus K000363039

First published in Linnaea 35: 476 (1868)

Accepted by

  • Retief, E. & Meyer, N.L. (2017). Plants of the Free State inventory and identification guide Strelitzia 38: 1-1236. National Botanical Institute, Pretoria.

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 chrysanthus.]
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Pycreus chrysanthus.]

Literature

Kew Backbone Distributions

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Figueiredo, E., Smith, G.F. & Nyffeler, R. (2013). August Wulfhorst (1861-1936) and his overlooked contributions on the flora of Angola Candollea 68: 123-131.
  • Retief, E. & Meyer, N.L. (2017). Plants of the Free State inventory and identification guide Strelitzia 38: 1-1236. National Botanical Institute, Pretoria.

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

Plants and People Africa
Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
© Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/