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This species is accepted, and its native range is Cosmopolitan.
Pycreus flavescens (L.) Reichb.

[CPLC]

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution
Nativa en Colombia; Alt. 1000 - 2820 m.; Andes.
Morphology General Habit
Hierba
Conservation
No Evaluada

[FTEA]

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

Type
Type: Kenya, Tana District: along River Tana, Gregory 87 (BM!, holo.; K!, part of holo.; from BM)
Morphology General Habit
Annual, up to 18 cm high.
Morphology Culms
Culms 5–18 cm long, 0.3–0.7 mm wide
Morphology Leaves
Leaf blade linear, 2–10 cm long, 0.3–1 mm wide, acuminate, glabrous Leaves up to 12 cm long. Leaf sheath brown, up to 1.2 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 1–2, erect or spreading, the lowermost 3–8 cm long, 1 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence loosely capitate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in a sessile lax digitate cluster. Spikelets 15 per head, ellipsoid-ovoid, 6–10 mm long, 2 mm wide, axis straight to slightly curved.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes reddish-brown to black, 1.7–2 mm long, 1.4 mm wide, keel acute to flat, pale brown
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 1.8–1.9 mm long
Morphology Reproductive morphology Fruits
Nutlet black, broadly ovoid, 0.7–0.8 mm long, 0.7–0.8 mm wide, with large elongate surface-cells, with faint to strong transverse wrinkles.
Ecology
In seasonally wet sites; altitude unclear
Conservation
This taxon is only known from one location in the Flora area, and two other collections in respectively Zambia and Angola. Data deficient (DD).
Distribution
Flora districts: K7 Range: Angola, Zambia

[FTEA]

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

Type
Type: Kenya, Fort Hall District, Lye
Morphology General Height
Up to 48 cm high.
Morphology Culms
Culms 13–43 cm long, 0.6–1.7 mm wide
Morphology Leaves
Leaf sheath (pale) reddish-brown, sometimes tinged with purple, 1.5–6 cm long. Leaf blade narrowly linear to filiform, 3.5–22 cm long, 0.7–2.2 mm wide, acute to acuminate Leaves up to 28 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts, the lowermost 5–14.7 cm long, 1.1–2.7 mm wide
Morphology Branches
Primary branches 1–5, (0–)1–7 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 3–20 per cluster, up to 40 in a head, 6–20 mm long, 1.8–2.9 mm wide, axis straight to sometimes ± curved.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes reddish-brown, sometimes pale, 1.6–2.2 mm long, 1.2–1.9 mm wide, keel green
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 1.5–2 mm long
Morphology Reproductive morphology Fruits
Nutlet black, 0.8–1.1 mm long, 0.6–0.9 mm wide, (almost smooth to) transversely wrinkled
Ecology
Swamps, river-sides, seasonally swampy grassland; 1300–2350 m
Conservation
Least Concern (LC) due to its wide distribution and common habitat
Distribution
Flora districts: U3 K3 K4 T4 T7 Range: Cameroon, Belgian Congo-Kinshasa, Angola, Mozambique, South Africa

[FTEA]

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

Type
Type: Uganda, Masaka District: 2–3 km S of West Mengo border on Kampala–Mbarara road, Lye & Katende 6542B (O, holo.; UPS, iso.)
Morphology General Height
Up to 30 cm high.
Morphology Culms
Culms 11–27 cm long, 0.5–0.6 mm wide
Morphology Leaves
Leaf sheath (pale) brown, 1.8–2.2 cm long. Leaf blade linear-filiform, flat, 8–18 cm long, 1–1.3 mm wide, apex acuminate Leaves up to 20 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts, the lowermost 6.8–6.9 cm long, 0.9–1.2 mm wide
Morphology Branches
Primary branches (0–)2–3, 2–3.6 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 3–7 per cluster, when in a head up to 20, 7.5–15 mm long, 2–2.2 mm wide, axis straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes golden brown, 1.6–1.7 mm long, 1.2–1.8 mm wide
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 1.5–1.7 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.2–0.3 mm long
Morphology Reproductive morphology Fruits
Nutlet brown to black, 0.7 mm long, 0.5–0.6 mm wide, transversely wrinkled
Ecology
On bare soil or in wet grassland, in edge of swamp; 0?–1140 m
Conservation
Data deficient – it is unclear whether the Zimbabwe specimens are indeed this taxon.
Distribution
Flora districts: U 4? Range: Zimbabwe

[FTEA]

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

Type
Type: Ethiopia, Tigre, Dschomara, Schimper 1267 (P, holo.; BM!, K, iso.)
Morphology General Habit
Annual, medium-sized, up to 40 cm high.
Morphology Culms
Culms ± tufted, trigonous, smooth, 16–34 cm long, 0.8–1.2 mm wide
Morphology Leaves
Leaves up to 16 cm long. Leaf sheath brown, 2.2–3.5 cm long. Leaf blade linear, flat to plicate, often folded, 10–14 cm long, 1.5–2 mm wide, acute, glabrous
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 2. Leaf-like, sub-erect to spreading, 10–12 cm long, 1.2–2 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence simple, primary branches 1–3, 0.5–5.5 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate clusters, sessile and at the end of primary branches. Spikelets 2–8 per cluster, up to 40 in a head, linear-oblong to lanceolate, 6–14.5 mm long, 2.3–3 mm wide, axis straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes brown, ovate, boatshaped, margins membranous, 1.9–2.2 mm long, 1.5–1.8 mm wide, keel 2–3-veined, green, apex acute to obtuse
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2–3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 1.8 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.4–0.7 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma 2-branched
Morphology Reproductive morphology Fruits
Nutlet reddish-brown, obovoid, ± biconvex, 1 mm long, 0.6 mm wide, transversely wrinkled
Ecology
Small temporary waterhole in wooded grassland, in ± 10 cm water; 275 m
Conservation
Widespread, possibly Least Concern (LC).
Note
Differences from P. flavescens (and especially with var. castaneus) are difficult to find; this taxon is therefore questionable and requires more study.
Distribution
Flora districts: T6 Range: Ethiopia, Angola

[FWTA]

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

Diagnostic
Similar to P. flavescens, but a generally taller plant with a more expanded inflorescence of acute spikelets
Ecology
Damp places.

[FWTA]

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

Diagnostic
Differing from P. flavescens in the narrower spikelet and narrower brown achene
Ecology
Damp places.

[FTEA]

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

Type
Type: “In Germaniae, Helvetiae, Galliae, paludosis” Lectotype: Herb. Burser I: 81 (UPS), chosen by Kukkonen in Taxon 53: 178 (2004)
Morphology General Habit
Annual, small to medium-sized, up to 55 cm high.
Morphology Culms
Culms tufted, 5–52 cm long, 0.3–1.7 mm wide, trigonous to somewhat rounded, smooth
Morphology Leaves
Leaf blade linear to filiform, flat to plicate, 2–22 cm long, 0.3–3 mm wide, acute to acuminate, apex (±) scabrid Leaves up to 28 cm long. Leaf sheath pinkish brown, pale brown to (pale) reddish-brown, sometimes tinged with purple, 1–6 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, 1–4, the lowermost 3–14.7 cm long, 0.9–3 mm wide, apex scabrid to glabrous
Morphology Reproductive morphology Inflorescences
Inflorescence capitate or simple, primary branches (0–)1–5, (0–)2.2–7 cm long, sometimes at the base with a tubular purplish prophyll.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate clusters, sessile and at the end of primary branches. Spikelets 3–14 per cluster, 15–40 in a head, linear-oblong to linear-ovoid to ovoid, 6–20 mm long, 1.8–2.9 mm wide, axis straight, sometimes curved.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes sometimes becoming almost transparent when nutlet is maturing, golden-yellow to golden-brown, reddish-brown to brownish-black, ovate, boatshaped, 1.5–2.2 mm long, 1–1.9 mm wide, keel 2–3-veined, pale brown to green, sometimes with reddish dots, apex obtuse
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 0.9–2 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.2–0.5 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma 2-branched
Morphology Reproductive morphology Fruits
Nutlet (reddish-)black, obovoid to ellipsoid, biconvex, 0.7–1.1 mm long, 0.4–0.9 mm wide, almost smooth to (white) transversly wrinkled
Figures
Fig. 44, p293
Note
This species is highly variable, and quite a number of species and varieties have been described in the past as a consequence. Many of these are based on only a small number of specimens. After careful examining of the material, three subspecies and one variety are upheld, although the boundaries are not always clear. Most specimens can, however, be assigned without much problem.

[FWTA]

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

Diagnostic
Similar to P. lanceolatus but generally not exceeding 30 cm. high; without a rhizome and often with shorter spikelets
Ecology
Wet places.

Native to:

Afghanistan, Alabama, Albania, Algeria, Angola, Arkansas, Azores, Baltic States, Bangladesh, Belarus, Belize, Benin, Bermuda, Bolivia, Botswana, Brazil North, Brazil South, Bulgaria, Burkina, Burundi, California, Cameroon, Cape Provinces, Central African Repu, Central American Pac, Central European Rus, Chad, Colombia, Congo, Corse, Costa Rica, Cuba, Czechoslovakia, Delaware, District of Columbia, Dominican Republic, East Aegean Is., East European Russia, Egypt, El Salvador, Eritrea, Ethiopia, Florida, France, Gabon, Gambia, Georgia, Germany, Ghana, Greece, Guatemala, Guinea, Guinea-Bissau, Guyana, Honduras, Hungary, Illinois, India, Indiana, Iran, Iraq, Italy, Ivory Coast, Jamaica, Kansas, Kazakhstan, Kentucky, Kenya, Kirgizstan, Kriti, Krym, KwaZulu-Natal, Lebanon-Syria, Lesotho, Louisiana, Madagascar, Madeira, Malawi, Mali, Maryland, Massachusetts, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Mississippi, Missouri, Morocco, Mozambique, Namibia, New Jersey, New York, Nicaragua, Niger, Nigeria, North Carolina, North Caucasus, Northern Provinces, Northwest European R, Ohio, Oklahoma, Ontario, Pakistan, Palestine, Panamá, Pennsylvania, Poland, Portugal, Puerto Rico, Romania, Rwanda, Sardegna, Senegal, Sicilia, Sierra Leone, South Carolina, South European Russi, Spain, Sudan, Swaziland, Switzerland, Tadzhikistan, Tanzania, Tennessee, Texas, Togo, Transcaucasus, Trinidad-Tobago, Tunisia, Turkey, Turkey-in-Europe, Uganda, Ukraine, Uzbekistan, Venezuela, Vietnam, Virginia, West Himalaya, West Virginia, Windward Is., Yemen, Yugoslavia, Zambia, Zaïre, Zimbabwe

Extinct in:

Belgium, Netherlands

Introduced into:

Austria, New South Wales, Queensland

Cyperus flavescens L. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Nov 1, 2003 Kongor Raphael [52], Cameroon K000746200
Nov 1, 2003 Onana, J.-M. [1898], Cameroon K000746201
May 1, 2001 Cheek, M. [9309], Cameroon K000050659
May 1, 2001 Pollard, B.J. [111], Cameroon K000050660
Jan 1, 1966 Adam, J.G. [018311], Senegal K000362906 holotype
Feb 1, 1893 Schaffner, J.G. [569], Mexico K000632085 syntype
Feb 1, 1893 Maack, R.K. [s.n.] K000881593
Feb 1, 1893 Maack, R.K. [s.n.] K000881593
s.coll. [Cat. no. s.n.], Myanmar Cyperus stramineus K001132689
May 1, 2005 Gregory, J.W. [s.n.], Kenya Pycreus flavescens subsp. tanaensis K000362996 holotype
Feb 1, 1893 Müller, F. [1987], Mexico Pycreus piceus K000632086
Feb 1, 1893 Liebmann [s.n.], Mexico Pycreus piceus K000632087
Mandon, G. [1393], Bolivia Pycreus piceus K000632076
Mar 1, 1893 Rehmann, A. [5651], South Africa Pycreus rehmannianus K000363035 Unknown type material
Schimper [122], Ethiopia Pycreus flavescens K000363009
Bidgood, S. [6147], Tanzania Pycreus flavescens K000468278
Schimper [122], Ethiopia Pycreus flavescens K000363010
Schimper [1267], Ethiopia Pycreus flavescens K000363011
Nelson, W. [13], South Africa Cyperus rehmannianus K000362926 syntype
Holub, E.M. [s.n.], South Africa Cyperus rehmannianus K000362928 syntype
Rehmann [4479], South Africa Cyperus rehmannianus K000362927 lectotype

First published in Sp. Pl.: 46 (1753)

Accepted by

  • Jørgensen, P.M., Nee, M.H. & Beck., S.G. (eds.) (2013). Catálogo de las plantas vasculares de Bolivia Monographs in Systematic Botany from the Missouri Botanical Garden 127: 1-1741.

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

Literature

Catálogo de Plantas y Líquenes de Colombia

  • ColPlantA (2021). "ColPlantA. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://www.colplanta.org/"

Kew Backbone Distributions

  • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • Edwards, S., Demissew, S., & Hedberg, I. (eds.) (1997). Flora of Ethiopia and Eritrea 6: i-xxviii, 1-586. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Hassler, M. (2012). Flora of Rhodes. Systematic list of flora of Rhodes http://www.rz.uni-karlsruhe.de/~db111/flora/rhodos/list.php.
  • Hohla, M. (2012). Bromus sitchensis - neu für Österreich, Plantago coronopus - neu für Oberösterreich sowie weitere Beiträge zur Kenntnis der Flora des Innviertels Stapfia 97: 180-192.
  • Jones, M. (1991). A checklist of Gambian plants: 1-33. Michael Jones, The Gambia College.
  • Jørgensen, P.M., Nee, M.H. & Beck., S.G. (eds.) (2013). Catálogo de las plantas vasculares de Bolivia Monographs in Systematic Botany from the Missouri Botanical Garden 127: 1-1741.
  • Lazkov, G.A. & Sultanova, B.A. (2011). Checklist of vascular plants of Kyrgyzstan Norrlinia 24: 1-166.
  • Lye, K.A. & Thery, P. (2012). Flore du Gabon 44: 1-230. Muséum National D'Histoire Naturelle, Paris.
  • Sarder, N.U. & Hassan, M.A. (eds.) (2018). Vascular flora of Chittagong and the Chittagong Hill Tracts 1: 1-897. Bangladesh National Herbarium, Dhaka.
  • Takhtajan, A.L. (ed.) (2006). Konspekt Flora Kavkaza 2: 1-466. Editio Universitatis Petropolitanae.

Catálogo de Plantas y Líquenes de Colombia
http://creativecommons.org/licenses/by-nc-sa/3.0

Colombian resources for Plants made Accessible
http://creativecommons.org/licenses/by/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 K000632085
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
Digital Image © Board of Trustees, RBG Kew K000362906
Digital Image © Board of Trustees, RBG Kew K000881593

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/