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(Upload on March 6 2014) [ 日本語 | English ]

Juncus L. (イグサ) Kurokougaizakisyou (クロコウガイゼキショウ, 黒笄石菖), chestnut rush Lifeform: perennial rush ≈ 50 cm high Distribution: circumboreal (reported only from Mounts Daisetsu in the case of Japan) Habitat: wet places on tundra and in the mountains Chromosome number: 2n = 40 Synonyms: Juncus satakei Kitag. Juncus triceps auct. non Rostkov.

Varieties in Alaska (Hultén 1968) ssp. castaneus ssp. leucochlamys (Zinz.) Hult., taller than ssp. castaneus with several heads. Reported mostly from interor Alaska

Juncus castaneus in Alaska

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[1-3] at a study site on Kougarok, Seward Peninsula, AK, on August 8 2013.