Cyperus corymbosus Rottb.

The above description is based on Iraqi material and specimens from India, primarily on: Khasia, 17. 11. 1850 Hooker & Thomson (K) and Andhra Pradesh, Samalkot Distr., Godawari, Madras hrb. no. 12494 (K). The name C. corymbosus Rottb. in solely to be assigned to Rottboell. The protologue (Rottb. 1772) cites as a synonym Scirpus corymbosus L., which is Rhynchospora corymbosa (L.) Britton, however, with a question mark, and later Rottboel (l.c., 1773) definitely excludes the synonym (see Kukkonen, Ann. Bot. Fennici 35: 169-170, 1998).

Perennial, 80-120 cm. Rhizome horizontal, 4-5 mm diam., woody. Stem 3-5 mm diam., trigonous above, smooth. Leaves reduced; sheaths to 30 cm, greyish green or brownish, often with reddish tint, mouth margin oblique; blades occasionally to 80 mm, 4 mm wide, rigid, smooth or slightly scabrous. Inflorescence a conical compound anthelodium, 10-20 cm; bracts 3-5 foliose, shorter than inflorescence, up to 16 cm and up to 6 mm wide, flat or margins slightly recurved, margins and keel scabrous, apex smooth or slightly scabrous, rather obtuse; primary branches 5-12, up to 130 mm; tubular prophyll up to 20 mm; secondary anthelodia to 80 mm, bracts up to 12 mm, c. as long as secondary tubular prophyll, secondary branches up to 45 mm, tertiary anthelodia occasional, tertiary branches 1-3, to 15 mm; cluster of spikes up to 20 x 30 mm, with 5-15 spikes, spikes reflexed; spikes 5-25 x c. 1 mm, with 8-22 glumes, fusiform, terete, glume-like bract c. 1.5 mm, glume-like prophyll c. 1.5 mm, with spongy basis; rachis quadrangular, c. 0.2 mm wide, internodes c. 0.8 mm, winged; glumes 2-2.5 mm, loosely imbricating, cymbiform, straw coloured to reddish brown, mid-nerve not pronounced, mucronate, apex rounded, margins widely scarious. Anthers c. 1 mm. Nuts not seen.

Pantropical.

Distribution: Pakistan; in tropical and subtropical regions from Myanmar and Sri Lanka west to Africa and the Americas.

100 m

Fl. Per.: June.

Flooded river banks.

Cyperus diphyllus Retz., Observ. bot. 5: 11. 1789; C. koenigii Vahl, Enum. Pl. 2: 302. 1805; Rottb., Descr. & Icon. Pl. Rar., t.VII, fig.4. 1773. Haines & Lye, Sedges and Rushes E. Afr.: Fig. 354. 1983.

Chile Central

Cyperus corymbosus is a species of sedge that is endemic to parts of South America, Africa, the Middle East and western Asia.

The species was first formally described by the botanist Christen Friis Rottbøll in 1772.

Cyperus corymbosus adalah spesies tumbuhan yang tergolong ke dalam famili Cyperaceae. Spesies ini juga merupakan bagian dari ordo Poales. Spesies Cyperus corymbosus sendiri merupakan bagian dari genus Cyperus. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Rottb..

Cyperus corymbosus là một loài thực vật có hoa trong họ Cói. Loài này được Rottb. mô tả khoa học đầu tiên năm 1773.