Family: Cyperaceae
Cyperus congestus
Citation:
Vahl, Enum. Pl. 2:358 (1805/6).
Synonymy: Not Applicable Common name: Dense flat-sedge.
Description:
Tufted perennial, 20-60 cm high; stems rather robust, acutely triquetrous, smooth, somewhat bulbous at the base; leaves shorter or longer than the stem, rather rigid, flat or the scabrous margins revolute, 2.5-5 mm broad; bracts 3-6, like the leaves, the lower longer than the inflorescence.
Umbel simple or compound or reduced to a compound head; rays rather rigid, 2-7, to 12 cm long; spikelets rather numerous in dense ovate or hemispherical spikes, rich-brown, linear or somewhat lanceolate, 8-20-flowered, turgid and somewhat quadrangular, acute, 8-25 mm long, 1.5-2 mm broad; rhachilla winged; glumes not very close together, tightly appressed or the tips spreading, acute in profile, with the obtuse keel nearly straight or upwardly distinctly incurred, prominently 9-nerved near the keel, the remainder nerveless, c. 4 mm long; stamens 3; style 3-branched.
Nut oblong to slightly obovoid, c. 1.8 x 0.8 mm, trigonous, sides nearly flat and angles rather acute, black, shiny, half the length of the glume.
Distribution:
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S.Aust.: NL, MU, SL, SE. W.Aust.; N.S.W.; Vic. Native to South Africa.
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Conservation status:
naturalised
Flowering time: Dec. — May.
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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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