| Family | Valerianceae |
| Scientific name | Patrinia villosa (Thunberg) Jussieu |
| Synonyms | Valeriana villosa Thunberg |
| Common name | (Japanese common name) otoko-eshi (オトコエシ, 男郎花 [meaning: male prostitute flower]) |
| (English common name) patrinia | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) Korea, China, Taiwan | |
| Habitat | Forest edge, field |
| Chromosomal number | 2n=22 |
| Description | Plants electing 100cm tall. Flowers white corollas 4mm acros, flowering in August to October. Fruits 2-3mm long. Perennial plants. |
| Reference | Patrinia villosa (Thunb.) Juss. |
| Pharmaceutical composition containing a mixed extract of Phellodendron amurense RUPRECHT cortex and Patrinia scabiosaefolia FISCH. for treatment of hepatitis C (US Patent 6113909/2000) | |
| Complex prescription of chinese medicine for the treatment of extensive cancer (US Patent 7005146/2006) |
| September 2006 at edge of forest |
September 2006 at edge of forest |
September 2006 at edge of forest |
| August 2008 at Tsukuba Botanical Garden |
August 2008 at Tsukuba Botanical Garden |
August 2008 at Tsukuba Botanical Garden |