African Plant Database

Pycreus nigricans (Steud.) C.B. Clarke
Protologue : Trans. Linn. Soc. London, Bot. 4: 53 (1894) (1894)
Information on the genus : Pycreus
Basionym : Cyperus nigricans Steud.
Status for MA : accepted (present)
Status for SA : accepted (present)
Status for TA : accepted (present)
Synonym(s) Homotypic
 Pycreus nigricans (Steud.) C.B. Clarke var. nigricans
 Cyperus nigricans Steud. (1842)
Synonym(s) Heterotypic
=Pycreus vavavatensis Cherm. (1919)
=Pycreus simulans Cherm. (1919)
=Pycreus vavavatensis var. simulans (Cherm.) Cherm. (1927)
Taxon infra-specific
Pycreus nigricans (Steud.) C.B. Clarke var. nigricans
Pycreus nigricans var. firmior (Kük.) Cherm.
Ecology and distribution
Trop. Afr.
Biology : Perennial herb forming very large dense tussocks to 30 cm Ø with many crowded leaves; root system of closely packed tough woody rhizomes and thick roots bearing persistent hard dark polished leaf bases; culms tufted, 35-90 cm long, 1-1,8 mm Ø, trigonous to slightly triquetrous, smooth, the angles sometimes set with small spine-like teeth, leaf sheath brownish-red (old ones black), 6-8 cm long; blades linear, folded, stiff, 22-74 cm x 2-3,5 mm, acute, apex scabrid; inflorescence very dark, capitate, compact, with a tar-like smell; spikelets crowded in sessile, ovoid-globose clusters, sometimes viviparous; spikelets 5-25 per cluster, ovoid, 8-17x2,5-5 mm; nutlet ± trigonous.
Ecology : Marshy ground, swamps, bogs, by rivers; montane grassland; meadow in bamboo forest; 1800-3600 m alt
  Rarely collected as rhizome and roots are tangled tight together and difficult to break up.
Biol./Eco : Herb; distribution: Africa.

Bibliography for Madagascar :
  • OLIVER, D., DYER, W.T.T.; PRAIN, D.; HILL, A.W. (1902). Flora of Tropical Africa 8: 292

Bibliography for Tropical Africa :
  • DARBYSHIRE, I. KORDOFAMI, M. & AL. (2015). The plants of Sudan and South Sudan, An annoted checklist. Kew Publishing : 114
More info on :
see under Jstor_African Plant Initiative
see under Flore d'Afrique Centrale
see under Catalogue de Madagascar
see under Missouri Botanical Garden
More information >> ( work in progress )
Record n°175581
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