Hare's-tail Cottongrass / Tussock cottongrass
Eriophorum vaginatum L. [Cyperaceae]
Watasuge (ワタスゲ, 綿菅 or スズメノケヤリ, 雀ノ毛槍)
Lifeform: perennial
Distribution: circumpolar
Habitat: wetland
Genus Eriophorum L.
Eriophorum: erion (Gr.) + forew (or phoreo) (Gr.) = 'wool' + 'to bring'
vaginatum: vagina (L.) = 'a covering, sheath'
ca 15 species in temperate and subarctic regions of the northern hemisphere
Three species in Japan
E. gracile Koch (サギスゲ)
E. vaginatum L. (ワタスゲ)
E. scheuchzeri Hoppe var. tenuifolium Ohwi (エゾワタスゲ)
Eriophorum vaginatum in interior Alaska
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[Left] A huge cottongrass community at 14 Mile Lake along Denali Highway on August 12 2010. [Center] An infloresence of cottongrass at Poker Flat, Faribanks, AK, on May 10 2006. This area was burned by the 2004 wildfire. [Right] a cottongrass tussock (谷地坊主) at Poker Flat on May 10 2006. [R/2nd] many flowering shoots on a tussock at Poker Flat on May 17 2005. (by JJ)
References
- facilitation 定着促進効果
- fire ecology 火災生態学
- Koyama, A. & Tsuyuzaki, S. 2010. Effects of sedge and cottongrass tussocks on plant establishment patterns in a post-mined peatland, northern Japan. Wetlands Ecology and Management 18: 135-148