| Family | Fumariaceae (alt. Papaveraceae) |
| Scientific name | Corydalis lineariloba Siebold et Zuccarini |
| Synonyms | Corydalis jezoensis Siebold ex Miquel |
| Common name | (Japanese common name) yama-engosaku [mountain engosaku (engosaku = a kind of traditional Chinese medicine)] |
| (English common name) none | |
| Distribution | (Japan) Honshu, Kyushu |
| (Other nations) Korea, China | |
| Chromosomal number | unknown |
| Description | Plants one or two stems 10-20cm. Flowers pale purple 15-25mm, flowering in April to May. Perennial plants. |
| April 2007 at Nikko Botanical Garden |
April 2007 at Nikko Botanical Garden |
April 2007 at Nikko Botanical Garden |
| April 2007 at Nikko Botanical Garden |
April 2007 at Nikko Botanical Garden |