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| August 2007 at Ushiku Forest Park |
August 2008 at Tsukuba Botanical Garden |
August 2007 at Ushiku Forest Park |
| Family | Penthoraceae (also placed in Saxifragaceae) |
| Scientific name | Penthorum chinense Pursh |
| Synonyms | Penthorum chinense de Candolle; Penthorum chinense Komarov; Penthorum humile Regel & Maack; Penthorum intermedium Turczaninow; Penthorum intermekium Regel; Penthorum sedoides forma angustifolium Miquel; Penthorum sedoides L. subsp. chinense (Pursh) S. Y. Li & K. T. Adair; Penthorum sedoides L. var. chinense (Pursh) Maximowicz |
| Common name | (Japanese common name) tako-no-ashi (タコノアシ, 蛸足 [meaning: octopus legs]) |
| (English common name) none | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu |
| (Other nations) Russia, Korea, China, Mongolia, Vietnam, Thailand, Laos | |
| Habitat | Swamp |
| Chromosomal number | 2n=16 |
| Description | Plants electing 30-70cm tall. Leaves 2.5-10cm long, 4-10mm wide. Flowers pale yellow, non petal, 10 stamens, flowering in August to September. Seeds ca. 0.6mm long. Perennial plants. |
| Reference | Penthorum chinense Pursh |
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| August 2007 at Ushiku Forest Park |
August 2008 at Tsukuba Botanical Garden |
August 2007 at Ushiku Forest Park |
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| January 2008 at Tsukuba Botanical Garden |
January 2008 at Tsukuba Botanical Garden |
