African Plant Database


Pycreus flavescens (L.) P. Beauv. ex Rchb.
Protologue : Fl. Germ. Excurs. 72 (1830)
Information on the genus : Pycreus
Basionym : Cyperus flavescens L.
 
 
Status
Status for MA : accepted (present)
Status for NA : accepted (present)
Status for SA : accepted (present)
Status for TA : accepted (present)
 
Synonym(s) Homotypic
 Pycreus flavescens (L.) P. Beauv. ex Rchb. subsp. flavescens
 Cyperus flavescens L. (1753)
 Distimus flavescens (L.) Raf.
 
Synonym(s) Heterotypic
=Cyperus lanceolatus C.B. Clarke
=Pycreus flavescens Cherm.
=Pycreus intermedius Cherm.
=Pycreus flavescens var. castaneus Lye
=Cyperus flavescens var. castaneus (Lye) Lye
 
Taxon infra-specific
Pycreus flavescens (L.) P. Beauv. ex Rchb. subsp. flavescens
Pycreus flavescens subsp. tanaensis (Kük.) Lye
Pycreus flavescens subsp. microglumis Lye
Pycreus flavescens subsp. fallaciosus (Cherm.) Lye
Pycreus flavescens var. rehmannianus (C.B. Clarke) Govaerts (2007)
 
Ecology and distribution
Trop. Afr.
Biology : Annual slender herb; culms tufted, 5-52 cm tall, 0,3-1,7 mm Ø, trigonous to ± rounded, smooth; leaves basal, shorter to longer than culm; sheath pinkish brown, pale brown to pale reddish-brown, sometimes tinged with purple, 1-6 cm long; blade flat to plicate, linear, 2-22 cm long, 0,5-3 mm wide, soft, acuminate, margins and midrib scabrous; inflorescence capitate or simple, umbel-like, with primary branches 0-5, unequal, 0-7 cm long; spikelets in digitate clusters, sessile and at end of primary branches, 3-14 per cluster and 15-40 in a head; spikelets linear-oblong, 0,6-2 cm x 1,8-3 mm, coloration variable, from pale yellowish-brown to deep dark red, the darker colours better represented at higher altitudes (Gordon-Gray, o.c.: 142); nutlet with faintly transversally undulate surface (with white silvery wavy lines; Boulos, o.c.).
Ecology : Swamps, marshes; wet places by streams, riverbanks, lake shores; seepage over rocks; in shallow soil over rock outcrops; bare soil; wet grassland; small temporary waterhole in wooded grassland; riverine forest; seasonally humid meadows; sands; cultivations and cultivation edges; 0-2500 m alt. – Weed. “In any disturbed area where water is available” (Gordon-Gray, o.c.: 142).
  Highly variable plant: in size, spikelet coloration.
Mada.
Biol./Eco : Herb; distribution: Africa. Europe, Asia, Australasia/Pacific, New World,

Bibliography for Tropical Africa :
  • PEYRE DE FABRÈGUES B. & J. P. LEBRUN (1976). Catalogue des plantes vasculaires du Niger. Maison Alfort : 340
  • PEYRE DE FABRÈGUES B. & J. P. LEBRUN (1976). Catalogue des plantes vasculaires du Niger. Maison Alfort : 340
  • BOUDET G. & J.P. LEBRUN (1986). Catalogue des plantes vasculaires du Mali. Etudes et Synthèses IEMVT 16 : 362
  • Cat. Pl. Vasc. Burkina Faso:54 (2012)
  • DARBYSHIRE, I. KORDOFAMI, M. & AL. (2015). The plants of Sudan and South Sudan, An annoted checklist. Kew Publishing : 114
  • CÉSAR J. & C. CHATELAIN (2019). Flore illustrée du Tchad. Conservatoire et Jardin botaniques de Genève, Coopération Suisse & Univ. N'Djaména : 127

Bibliography for North Africa :
  • HAINES, R. W. & K. A. LYE (1983). The sedges and rushes of East africa : 281
  • HANSEN, A. & P. SUNDING (1993). Flora of Macaronesia. Checklist of vascular plants. 4. revised edition Sommerfeltia 17: 1-295
  • Fl. Egypt (Boulos) 4: 398 (2005).
  • BOULOS, L. & E. LE FLOC'H (2008). Flore de Tunisie: catalogue synonymique commenté : 317
  • BORGES P.A.V., C. ABREU & AL. (2008). A list of the terrestrial fungi, flora and fauna of Madeira and Selvagens archipelagos. Direcção Regional do Ambiente da Madeira and Universidade dos Açores : 207
  • FENNANE, M., M. IBN TATTOU, J. MATHEZ, A. OUYAHYA (2014). Flore Pratique du Maroc [vol.3] Trav. Inst. Sci. Univ. Mohammed V, Sér. Bot. 3: 471
 
More info on :
see under Jstor_African Plant Initiative
see under The Euro-Mediterranean Plant Base
see under Flore d'Afrique Centrale
see under The International Plant Name Index
see under Catalogue de Madagascar
see under African Plants - a Photo Guide
see under Tropicos.org. Missouri Botanical Garden
see under Herbarium, North Africa MPU
 
Map
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Record n°175583 modified 2008-07-02
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