Cyperus angustatus

Primary tabs

Cyperus angustatus

Description

Perennial with very short rhizome. Leaves few, mostly shorter than the stems, narrowly linear, rigid, involute, not or hardly septate-nodulose, greyish green, scabrid on the margins in the upper part, 2-4 mm wide. Inflorescence compound, loose. Stamens 3;

Distribution

Asia-Tropical, N. Australia present, S. New Guinea, near Kurik present, tropical Australia present
Tropical Australia (N. Australia, Queens-land), in Malesia: once (1962) collected in S. New Guinea, near Kurik.

Notes

The species belongs to a most difficult group of Australian forms which Néerls to be monographed. According to , KÜKENTHAL'S arrangement of the forms and his key to them in Pflanzenreich is very unsatisfactory.
The New Guinea specimens are much larger than the type, a single culm in BM, of which there seem to be no duplicates anywhere. Also in Australia the species has been rarely collected.
CLARKE and KÜKENTHAL placed C. angustatus and allies in the genus resp. subgenus Mariscus. DOMIN and S. T. BLAKE, l.c., pointed to the fact that in some species of the group the rachilla is persistent and the glumes are deciduous, while in others the characters of subg. Mariscus and subg. Cyperus are combined.

Citation

Benth. 1878 – In: Fl. Austr. p 282
STEUD. 1855 – In: Syn. p 53
KUNTH 1837 – In: En. p 111
BOECK. 1874 – In: Linnaea. p 366
KÜK. 1936 – In: Pfl. R. p 452
DOMIN 1915 – In: Bibl. Bot. p 444