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| May 2008 at Hokkaido University Botanical Garden |
May 2008 at Hokkaido University Botanical Garden |
May 2008 at Hokkaido University Botanical Garden |
| Family | Polygonaceae |
| Subfamily | Polygonoideae |
| Scientific name | Aconogonon weyrichii (F. Schmidt ex Maximovicz) H. Hara |
| Synonyms | Reynoutria weyrichii (F. Schmidt) Moldenke; Persicaria weyrichii (F. Schmidt ex Maximovicz) L. P. Ronse Decraene; Pleuropteropyrum weyrichii H. Gross; Polygonum weyrichii F. Schmidt ex Maximovicz |
| Common name | (Japanese common name) urajiro tade (ウラジロタデ, 裏白蓼 [meaning: white backside Polygonum]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu (north of Central region) |
| (Other nations) Russia (Far East) | |
| Habitat | Alpine rocks |
| Chromosomal number | 2n=20 (2n) |
| Description | Plants 30-100cm tall. Leaves 10-15cm wide, lower surface white, hairy. Flowers pale yellow perianths 1.5-2mm long (male flower), flowering in June to October. Perrenial plants. |
| Reference | Aconogonon weyrichii (F. Schmidt ex Maxim.) H. Hara |
| Note | Polygonum savatieri (Nakai) Tzvelev is a synonym of Aconogonon alpinum (Allioni) Schur (Syn. Aconogonon weyrichii (F. Schmidt ex Maximovicz) H. Hara var. alpinum (Maximovicz) H. Hara). Lower surface of lief of Aconogonon weyrichii var. alpinum is green, not white. |
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| May 2008 at Hokkaido University Botanical Garden |
May 2008 at Hokkaido University Botanical Garden |
May 2008 at Hokkaido University Botanical Garden |
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| June 2008 at Hokkaido University Botanical Garden |
June 2008 at Hokkaido University Botanical Garden |
June 2008 at Hokkaido University Botanical Garden |
