2300 001-01-5781 Cyperus cyperinus, occurrence 1, plant 1 (large clump; the longest inflorescences are about 30 cm long) and plant 2 (small plant at bottom left). O`ahu, Wai`anae Mountains, Kaua`ōpu`u (peak).

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2300 001-01-5781 Cyperus cyperinus, occurrence 1, plant 1 (large clump; the longest inflorescences are about 30 cm long) and plant 2 (small plant at bottom left). O`ahu, Wai`anae Mountains, Kaua`ōpu`u (peak).
2300 001-01-5781 Cyperus cyperinus, occurrence 1, plant 1 (large clump; the longest inflorescences are about 30 cm long) and plant 2 (small plant at bottom left). O`ahu, Wai`anae Mountains, Kaua`ōpu`u (peak).

Cyperus cyperinus (Retzius) Suringar
Synonym: Mariscus cyperinus (Retzius) Vahl
Hawaiian names: -
Family: Cyperaceae - the sedge family
Perennial.

Native to the Hawaiian Islands and elsewhere (old world tropics and subtropics, as far north as southeastern Tibet; northeastern Australia, and many islands in the Indian and Pacific Oceans). In Hawai`i it has been collected on Kaua`i, the Wai`anae Mountains on O`ahu (leeward side of the mountain range, on ridges and cliffs in or adjoining the valleys of Lualualei, Wai`anae Kai, and Mākaha), East Moloka`i, West Maui (leeward side, southwestern slope of Līhau), and East Maui (southwestern side of Haleakalā in Kanaio and at Pu`unaio).

In much of C. cyperinus’ range outside of Hawai`i, the species is not uncommon and it is regarded as a weedy plant. In Hawai`i, however, it appears to be a rare, non-weedy plant that is usually found in native dominated vegetation. Elsewhere in its range, the species often occurs in wet habitats, whereas in Hawai`i it occurs only in dry to dry-mesic habitats.


June 16, 2011

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Taken on: June 16, 2011
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