Cyperus pilosus
Content
Description
Perennial, the rhizome emitting slender stolons clothed with lanceolate scales.
Leaves shorter than to as long as the stems, canaliculate or somewhat plicate with 3 prominent nerves, weak to rather rigid, gradually acuminate, scabrous on margins and nerves in the upper part, 4-10(-13) mm wide;
Inflorescence compound, very variable in size and density.
Stamens 3;
Distribution
Asia-Tropical, Central Asia present, Japan present, tropical Asia present, tropical Australia present, tropical W. Africa present
From Central Asia and Japan through the whole of tropical Asia and tropical Australia, very rare in tropical W. Africa; throughout Malesia, common and often abundant.
Notes
For the differences with the very closely related C. procerus, see under that species.
C. pilosus is very variable in size, colour of the glumes, number of the flowers in the spikelets, etc., but the species, varieties, and forms based on these differences have no taxonomic value and were already merged into the species by VALCKENIER SURINGAR. CLARKE mentions specimens with glabrous or almost glabrous rachis of the spikes; they have not yet been collected in Malesia. Some specimens from W. Java and the Kangean Archipelago have persistently erect spikelets and therefore penicillate spikes. They may represent a distinct variety analogous to C. distans var. pseudonutans.
C. pilosus is very variable in size, colour of the glumes, number of the flowers in the spikelets, etc., but the species, varieties, and forms based on these differences have no taxonomic value and were already merged into the species by VALCKENIER SURINGAR. CLARKE mentions specimens with glabrous or almost glabrous rachis of the spikes; they have not yet been collected in Malesia. Some specimens from W. Java and the Kangean Archipelago have persistently erect spikelets and therefore penicillate spikes. They may represent a distinct variety analogous to C. distans var. pseudonutans.
Citation
Ridl. 1907 – In: Mat. Fl. Mal. Pen. (Monoc.): 67
VALCK. SUR. 1898: Gesl. Cyp. Mal. Arch: 128: t. 4 f. 32
CAMUS 1912: p. 62. – In: Fl. Gén. I.-C.: f. 6, 12
VAHL 1922 – In: Exk. Fl. Java: f. 224
O.K. 1891: Rev. Gen. Pl.: 750
Merr. 1923 – In: En. Philip.: 107
Clarke 1884 – In: J. Linn. Soc. Bot.: 148
BOECK. 1868 – In: Linnaea: 598
Clarke 1893 – In: Fl. Br. Ind.: 609
BACK. 1949 – In: Bekn. Fl. Java, (em. ed.): fam. 246, p. 34
NAVES 1882: NOV. App.: 304
Miq. 1856 – In: Fl. Ind. Bat.: 279
Miq. 1856 – In: Fl. Ind. Bat.: 275
Koord. 1911 – In: Exk. Fl. Java: 191
NAVES 1882: NOV. App.: 305
STEUD. 1855 – In: Syn.: 40
KERN 1968 – In: Back. & Bakh.f., Fl. Java 3: 477
BOECK. 1868 – In: Linnaea: 611
KÜK. 1935 – In: Pfl. R.: 92
NEES 1854 – In: Hook., J. Bot. Kew Misc. 6: 28
Ridl. 1925 – In: Fl. Mal. Pen.: 144
Clarke 1907 – In: Philip. J. Sc.: Bot. 84
Benth. 1878 – In: Fl. Austr.: 275
BACK. 1928: Onkr. Suiker: 138: t. 135
Miq. 1856 – In: De Vriese, Pl. Ind. Bat. Or.: 139
PALLA 1912 – In: Allg. Bot. Zeitschr.: Beil. 8