(First upload on April 17 2004. Last on October 24 2022) [ 日本語 | English ]
Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily
HOME > Plant list (植物リスト) > Cyperaceae (カヤツリグサ科) > Carex (スゲ属) > Carex oxyandra
Carex L. (スゲ)Section Acrocystis (ヒメスゲ) when establishedor Digitatae (ヒカゲスゲ)Himesuge (ヒメスゲ, 姫菅), hill sedgeLife form: perennial sedge Distribution: througout Japan. Taiwan (northern element) - disjunct distribution on alpine volcanic-ash soil in Kyushu and Shikoku Habitat: sunny, dry sites → flora on: Mount Usu, Mount Koma |
Chromosome number: 2n = 18, 20, 24 or 26
Heteroploid strains (with decreasing large chromosomes and increasing small chromosomes) developes normal bivalent chromosomes by meiosis, showing that the strains are genetically stable (Hoshino 1981)
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[1] on Mount Usu on July 6 2006. [2-4] on the southwest slope of Mount Koma ⇒ often developing tussock (谷地坊主). [2/3] on June 15 2010. [4] on July 8 2019. [5] along a trail over the forest line on Mount Tarumae on June 28 2022. [6/7] on the summit of Mount Koma on June 20 2022.