| Family | Ranunculaceae |
| Scientific name | Thalictrum integrilobum Maximovicz |
| Synonyms | Thalictrum filamentosum Maximovicz var. integrilobum (Maximovicz) Ohwi |
| Common name | (Japanese common name) nagaba-karamatsu [long leaved karamatsu-sou (karamatsu-sou = Thalictrum species)] |
| (English common name) none | |
| Distribution | (Japan) Hokkaido |
| (Other nations) none | |
| Chromosomal number | unknown |
| Description | Plants electing 30cm tall. Leaves leaflets each 1.5-3cm long. Flowers white, flowering in May to June. Perennial plants. |
| Note | Endemic to Japan |
| May 2008 at Hokkaido University Botanical Garden |
May 2008 at Hokkaido University Botanical Garden |
May 2008 at Hokkaido University Botanical Garden |
| May 2008 at Hokkaido University Botanical Garden |