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(First upload on August 2 2012. Last on November 24 2019) [ 日本語 | English ]

Carex L. (スゲ) Section Rarae (Capitellatae) Ezoharisuge (エゾハリスゲ, 蝦夷針菅). Uda needle sedge O-harisuge (オオハリスゲ) Lifeform: perennial sedge Distribution: northeastern China - Far East - Korea - northern Japan (north to Chubu District) - Sakhalin - Amur - Ussuri Habitat: widespread in moist and wet meadows Endangered species (絶滅危惧種): rank UN Inflorescence: solitary at terminal, androgynous, 7-10 mm long, with a few staminate flowers above and 10-20 pistillate flowers below in Mem., Prim. Fl. Amur 303 (1859)

Shimizu T. 2005. Carex semihyalofructa, a new species of Carex Sect. Rarae (Capitellatae) from Japan. Acta Phytotax. Geobot. 56: 33-39 Carex semihyalofructa is described as new based on a specimen collected at Mt. Kurikoma, Akita Prefecture, Japan. Though similar to C. fulta, C. onoei and C. uda, C. semihyalofructa is clearly distinguished by its nerveless and beakless utricles, creeping rhizomes and by the wide space that surrounds the achenes in their utricles. C. semihyalofructa occurs throughout central and northern Honshu, along the Japan Sea side from Fukui to Akita Prefectures.

Carex uda in Hokkaido

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[1-3] at Horonai River in the Tomakomai Experimental Forest of Hokkaido University, central Hokkaido, on June 25 2012. [4-6] in the Shibecha Experimental Forest of Kyoto University, eastern Hokkaido, on June 27 2019.