Cyperus radians

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Cyperus radians


Perennial with very short rhizome. Leaves surpassing the stems, canaliculate to conduplicate, rigid, often recurved, gradually acuminate, more or less scaberulous at the top, 2-5(-8) mm wide; Inflorescence simple or compound, loose. Stamens 3;


Asia-Tropical: Borneo present; Malaya (Peninsular Malaysia present), Banka present, Farther India present, S. and E. China present, SE. Asia present, Southern America: Argentina Northeast (Formosa present)
SE. Asia: Farther India, S. and E. China, and Formosa, in Malesia restricted to the western part: Malay Peninsula, Banka, Borneo.


The long rays of the inflorescence are easily mistaken for stems. The real stem is often extremely shortened and hardly visible.
Highly variable species. In 1884 CLARKE distinguished between C. griffithii and C. radians, which he even would like to place in different sections, but which he united in 1893. Also VALCKENIER SURINGAR took C. radians (C. griffithii sensu CLARKE 1884) and C. macropus (C. radians sensu CLARKE 1884) for different species. The extreme forms are connected by a long series of intermediates.
KÜKENTHAL’S var. compositus was based on a specimen from Trengganu, leg. RIDLEY, merely a luxuriant plant of otherwise normal C. radians.


BOECK. 1868 – In: Linnaea: 515
NEES & MEYEN 1925 – In: Fl. Mal. Pen.: 143
VALCK. SUR. 1898: Gesl. Cyp. Mal. Arch: 84: t. 4 f. 7; t. 5 f. 1
VALCK. SUR. 1898: Gesl. Cyp. Mal. Arch: 86: t. 5 f. 2-4
NEES & MEYEN 1893 – In: Fl. Br. Ind.: 605
Clarke 1884 – In: J. Linn. Soc. Bot.: 101
KÜK. 1936 – In: Pfl. R.: 214
CAMUS 1912: p. 52. – In: Fl. Gén. I.-C.: f. 6, 1-3
Clarke 1884 – In: J. Linn. Soc. Bot.: 100
Ridl. 1907 – In: Mat. Fl. Mal. Pen. (Monoc.): 66
ex KUNTH 1837 – In: En.: 95