| Family | Melanthiaceae (also placed in Liliaceae) |
| Tribe | Melanthieae |
| Scientific name | Veratrum maackii Regel var. parviflorum (Maximovicz ex Miquel) Hara et Mizushima |
| Synonyms | Veratrum album L. var. parviflorum Miquel; Veratrum maackii Regel var. maackioides (O. Loesener) Hara forma virescens Hara; Veratrum maximovizii Baker; Veratrum nigrum L. subsp. maackii (Regel) Kitamura var. parviflorum (Maximovicz ex Miquel) Kitamura |
| Common name | (Japanese common name) aoyagi-sou (アオヤギソウ, 青柳草 [meaning: green willow weed]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (north of Central region) |
| (Other nations) Korea | |
| Habitat | Swamp in forest or fiields |
| Chromosomal number | 2n=16 |
| Description | Plants 60-100cm tall. Flowers green tepals each 5.5mm long, flowering in July to August. Perennial plants. |
| Reference | Veratrum maackii Regel |
| Use of steroidal alkaloids to reverse multidrug resistance (WIPO Patent WO/2001/049279) | |
| Composition for skin whitening (WIPO Patent WO/2003/057183) |
| July 2007 at Tsukuba Botanical Garden |
July 2007 at Tsukuba Botanical Garden |
July 2007 at Tsukuba Botanical Garden |
| July 2007 at Tsukuba Botanical Garden |