(First upload on December 8 2003. Last on October 21 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) > Polygonaceae (タデ科) > Rumex acetosella
Rumex L. (スイバ)Hime-suiba (ヒメスイバ, 姫酢葉, s.l.), sheep sorrel, or red sorrelLifeform: weedy perennial forb Distribution: Native to Europe (extotic to Japan) Habitat: ruderal grasslands flora on Mount Koma, Mount Usu Shoot: dioecious / vegetative reproduction by stolonsSeed dispersal: gravity → seedbank |
Chromosome number: 2n = 14, 28, 41, 42 or 43 Synonyms:
Rumex acetosella L.ssp.pyrenaicus (Pourret ex Lapeyr.) Akeroyd (s.s.) ssp. acetosella (ヒナスイバ), the type, gymnocarpous, widespread in Europe (reported only from Miyagi in the case of Japan) |
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[1] along a paved road on N24/E1, East Ward, Sapporo, on April 21 2020. [2/3] on a roadside at the foot of Abuta Shrine (虻田神社) on June 6 2013. [4] on the trail near the parking lot on Mount Koma. On July 9 2009. [5/6] at the backyard of the Institute of Low Temperature Science, Hokkaido Univeristy, on May 19 2016. [7] on the southern part of crater basin on Mount Usu on July 5 2022. The seeds of this species was detected from the former topsoil (Tsuyuzaki 1989, 2010).