Family: Cyperaceae
Cyperus sanguinolentus
Citation:
Vahl, Enum. Pl. 2:351 (1805/6).
Synonymy: C. eragrostis sensu Vahl, Enum. Pl. 2:322 (1805/6), non Lam.
Common name: Flat-sedge.
Description:
Annual, to 40 cm high, sometimes dwarfed to 2-3 cm high; stems solitary or tufted, ascending to erect, almost setaceous in small plants, coarser in others, triquetrous, striate, smooth; leaves grass-like, variable, to 3 mm wide, shorter than the stems; bracts 3 or 4, spreading, at least the lower longer to much longer than the inflorescence.
Inflorescence capitate or umbellate, the rays few, short, to 4 cm long; spikelets clustered, mostly dark, oblong or oblong-lanceolate, 5-14 mm long, 1.5-2 mm wide, 8-20-flowered, strongly flattened; rhachilla not winged; glumes rather loose, with a broad green keel, the sides with a dark-red blotch and almost nerveless, c. 2 mm long; style branches 2.
Nut orbicular-obovoid, apiculate, abruptly cuneate to a narrow base and appearing shortly stipitate, c. 1.2 x 0.7 mm, laterally biconvex with an edge near the rhachilla, straw-coloured to brown or nearly blackish, with a very faint shiny transparent reticulate-papillose layer, rather less than half the length of the glume.
Distribution:
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Grows in wet places.
S.Aust.: FR, MU, SL. Native in all mainland States except W.Aust. and the N.T. Africa and Asia.
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Conservation status:
naturalised
Flowering time: Nov. — April.
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SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
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Biology:
No text
Author:
Not yet available
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