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Electronic Flora of South Australia
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Electronic Flora of South Australia species Fact Sheet

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:  S.Aust.: NL, MU, SL, SE.   W.Aust.; N.S.W.; Vic.   Native to South Africa.

Conservation status: naturalised

Flowering time: Dec. — May.


SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia

Biology: No text

Author: Not yet available


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