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!Pycreus P. Beauv. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Flore d'Oware 2: 48. 1816. (Fl. Oware) Name publication detail
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Synonym Text: Cyperus subg. Pycreus (P. Beauv.) C.B. Clarke, J. Linn. Soc. Bot. 21: 33. 1884.
General/Distribution: A genus with c. 70 species, distributed in tropical and warm areas; represented in Pakistan by 6 species.

 

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Annuals, occasionally perennials, 4-65 cm; caespitose, or basal internodes elongated and rooting; rhizome, when present, short, stoloniferous. Stem 0.3-2.5 mm diam., trigonous above. Leaves from 1/2 of stem length to much exceeding it, sheaths 15-50 mm; ligule 0; blades 7-20 cm, 1.5-3 mm wide. Inflorescence from a single cluster of digitate spikes to small anthelodium, elongate primary branches 0-4, 15-50 mm; cluster of spikes with 3 - 100 spikes, 15-30 mm, 1-4 foliose bracts up to 15 cm long; spikes 4-30 x 1-3 mm, rachis nearly quadrangular, with or without wings, with 8-40 glumes; stamens 1-2, stigmas 2; nut lenticular, edge towards rachis.
 

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1 Plants loosely tufted or single; stem base decumbent, rooting at nodes; margins of glumes reddish or reddish brown.
+ Plants tightly tufted; stem base erect; margins of glumes not reddish. (2)
2 (1) Small annuals, up to 10 cm, stamens 1-2. (2)
+ Tall annuals or perennials, up to 60 cm, stamens 2-3. (3)
3 (2) Bracts up to 5 cm, nut 0.5-0.7 mm. 4 Pycreus pumilus
+ Bracts up to 13 cm, nut c. 1.2 mm 5 Pycreus dwarkensis
4 Spikes in loose clusters, 2-2.5 mm wide, spreading; bracts 1-3, 0.5-2 mm wide; nut 0.8-1 x 0.5-0.8 mm. (5)
+ Spikes in tight clusters, 1-1.5 mm wide, erect; bracts 3-4, 2-4 mm wide; nut 0.9-1 x 0.3-0.4 mm. 3 Pycreus polystachyos
5 (4) Leaf blades (0.5-)1-2 mm; bracts 2-3; nut 0.8-1 x 0.6-0.8 mm, rugulose with transverse wavy lines, epidermal cells longitudinally elongated. 6 Pycreus flavescens
+ Leaf blades 1-3 mm wide; bracts 1-2; nut 0.8-1 x 0.5-0.7 mm, finely reticulate, epidermal cells isodiametric. 2 Pycreus flavidus
 
 
 
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