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| March 2008 at Nikko Botanical Garden |
March 2008 at Nikko Botanical Garden |
March 2008 at Nikko Botanical Garden |
| Family | Asteraceae (alt. Compositae) |
| Scientific name | Prenanthes tanakae (Franchet & Savatier ex Y. Tanaka & Ono) Koidzumi |
| Synonyms | Nabalus tanakae Franchet & Savatier ex Y. Tanaka & Ono; Prenanthes ochroleuca (Maximovicz) Hemsley var. tanakae (Franchet & Savatier ex Y. Tanaka & Ono) Koidzumi |
| Common name | (Japanese common name) oh^nigana (オオニガナ, 大苦菜 [meaning: large bitter weed]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (north of Kinki region) |
| (Other nations) none | |
| Habitat | Swamp |
| Chromosomal number | unknown |
| Description | Plants electing ca. 60-90cm tall. Leaves 1-3cm wide. Flowers yellow, flowering in August to November. Perennial plants. |
| Reference | Karyotype Analysis in Japanese Cichoricae II |
| Note | Rare species. |
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| March 2008 at Nikko Botanical Garden |
March 2008 at Nikko Botanical Garden |
March 2008 at Nikko Botanical Garden |
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| March 2008 at Nikko Botanical Garden |
