Cyperus platystylis

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Cyperus platystylis


Perennial with very short rhizome; Leaves basal, channelled or flat, as long as or longer than the stems, gradually acuminate, septate, nodulose, coriaceous, very scabrous (cutting) on margins and midrib, glaucous or greyish green, 8-12(-20) mm wide, lower sheaths bladeless, strongly keeled, cinnamomeous to purplish. Inflorescence compound or decompound, often with very numerous spikelets, depressed-corymbose or semiglobose, very dense to rather loose, up to 30 cm across. Stamens 3;


Asia-Tropical: Borneo present; India present; Malaya (Peninsular Malaysia present); Maluku (Maluku present); New Guinea present; Philippines (Philippines absent); Sulawesi (Sulawesi present); Sumatera (Sumatera present), Australasia: New South Wales (New South Wales present); Queensland (Queensland present), Ceram present, Ceylon present, Lesser Sunda Is present, N. Australia present, Southern America: Argentina Northeast (Formosa present), Sumba present, W. and E. Java present
From Ceylon and India to Formosa (here only known from a single locality), and through Malesia to N. Australia, Queensland, and New South Wales; in Malesia very rare in Sumatra, the Malay Peninsula, W. and E. Java, the Lesser Sunda Is. (Sumba), Borneo, Celebes, the Moluccas (Ceram), and New Guinea; not known from the Philippines.


The corky tissue on the nuts enables dispersal by water. See .


R.BR. 1893 – In: Fl. Br. Ind.: 598
Ridl. 1907 – In: Mat. Fl. Mal. Pen. (Monoc.): 63
VALCK. SUR. 1898: Gesl. Cyp. Mal. Arch: 103: t. 4 f. 21
KUNTH 1837 – In: En.: 111
SCHEFFER 1874 – In: Nat. Tijd. N. I.: 52
R.BR. 1922 – In: Exk. Fl. Java: f. 214
KÜK. 1936: p. 185. – In: Pfl. R.: f. 21
BACK. 1928: Onkr. Suiker: 134: t. 130
Merr. 1921: En. Born.: 55
Ridl. 1925 – In: Fl. Mal. Pen.: 141
KERN 1952: p. 112. – In: Reinwardtia: f. 8
Clarke 1884: 27, 117. – In: J. Linn. Soc. Bot.: t. 1 f. 7-9
Koord. 1911 – In: Exk. Fl. Java: 189
R.BR. 1968 – In: Back. & Bakh.f., Fl. Java 3: 472
BACK. 1949 – In: Bekn. Fl. Java, (em. ed.): fam. 246, p. 31
NEES 1834 – In: Wight, Contr.: 79
Benth. 1878 – In: Fl. Austr.: 264
KUNTH 1837 – In: En.: 40
S. T. BLAKE 1947 – In: J. Arn. Arb.: 215