Cyperus iria
Content
Description
Annual, or perennial in favourable circumstances;
Leaves basal, shorter than to somewhat longer than the stems, flat or channelled, rather flaccid, gradually acuminate, scabrous on the margins in the upper parts, 3-6(-8) mm wide.
Inflorescence greatly varying in size, simple or compound, usually loose, up to 20 cm long.
Stamens 2-3;
Distribution
Afghanistan present, Asia-Temperate: Iran (Iran present), Asia-Tropical, Australasia, Japan present, SE. United States, Southern America, tropical Asia present, tropical E. Africa present
Widely spread in tropical Asia, extending northwards to Iran, Afghanistan, China, and Japan, southwards to Australia, and westwards to tropical E. Africa; introduced and naturalised in the SE. United States and the West Indies; common throughout Malesia.
Notes
Very variable in size and the number of flowers in the spikelets. The extremes are connected by numerous intermediates and do not deserve nomenclatural recognition. LOHER 7159 from the Philippines represents ƒ. chrysomelinus (LINK) [C. chrysomelinus ], with setaceous stems and leaves, and the inflorescence reduced to 1-2 spikelets. It is probably a depauperated form, also of little or no taxonomical value.
C. microiria STEUD., wrongly referred to C. iria var. parviflorus MIQ., is a well-characterised, E. Asian species not extending to Malesia.
C. microiria STEUD., wrongly referred to C. iria var. parviflorus MIQ., is a well-characterised, E. Asian species not extending to Malesia.
Citation
Ridl. 1907 – In: Mat. Fl. Mal. Pen. (Monoc.): 66
F.-VILL. & NAVES 1880 – In: Blanco, Fl. Filip., ed. 3, 4: 9
LINNÉ 1893 – In: Fl. Br. Ind.: 606
LINNÉ 1922 – In: Exk. Fl. Java: f. 215
VALCK. SUR. 1898: Gesl. Cyp. Mal. Arch: 105: t. 4 f. 16
HASSK. 1848: Pl. Jav. Rar.: 83
KERN 1968 – In: Back. & Bakh.f., Fl. Java 3: 479
BACK. 1928: Onkr. Sinker: 135: t. 131
KÜK. 1935 – In: Pfl. R.: 150
PALLA 1912 – In: Allg. Bot. Zeitschr.: Beil. 6
Koord. 1911 – In: Exk. Fl. Java: 189
CAMUS 1912: p. 59. – In: Fl. Gén. I.-C.: f. 6, 4-6
Benth. 1878 – In: Fl. Austr.: 276
BOECK. 1868 – In: Linnaea: 595
S. T. BLAKE 1947 – In: J. Arn. Arb.: 214
Miq. 1856 – In: Fl. Ind. Bat.: 269
STEUD. 1855 – In: Syn.: 23
BACK. 1949 – In: Bekn. Fl. Java, (em. ed.): fam. 246, p. 34
Merr. 1923 – In: En. Philip.: 106
Clarke 1909: Ill. Cyp.: t. 4 f. 2
Ridl. 1925 – In: Fl. Mal. Pen.: 143
Clarke 1907 – In: Philip. J. Sc.: Bot. 83
Clarke 1884 – In: J. Linn. Soc. Bot.: 137