| Family | Phrymaceae |
| Scientific name | Phryma leptostachya L. |
| Synonyms | Leptostachia carolinensis Kuntze; Leptostachia leptostachya (L.) MacMillan; Phryma humilis Koidzumi; Phryma leptostachya Nakai; Phryma leptostachya L. subsp. asiatica (H. Hara) Kitamura; Phryma leptostachya L. subsp. asiatica (H. Hara) Kitamura var. nana (Koidzumi) H. Hara; Phryma leptostachya L. var. asiatica (H. Hara) Kitamura; Phryma leptostachya L. var. confertifolia Fernald; Phryma leptostachya L. var. humilis (Koidzumi) Hara; Phryma leptostachya L. var. nana (Koidzumi) Hara; Phryma media Rafinesque; Phryma mitchellii Endlicher; Phryma nana Koidzumi; Phryma parvifiora Rafinesque; Phryma pubescens Rafinesque |
| Common name | (Japanese common name) hae-dokuso (ハエドクソウ, 蠅毒草 [meaning: fly poison weed]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) Russia, Korea, China, Vietnam, Nepal, Bhutan, India, Pakistan, Canada, USA | |
| Habitat | Forest |
| Chromosomal number | 2n=28 |
| Description | Plants 30-70cm tall. Leaves 7-15cm long, 4-7cm wide. Flowers white corollas 5mm, flowering in July to August. Perennial plants. |
| Reference | Phryma leptostachya L. |
| Phryma leptostachya L. |
| June 2007 at lowland forest edge |
September 2008 at Ushiku Forest Park |
June 2007 at lowland forest edge |
| June 2007 at lowland forest edge |
June 2007 at lowland forest edge |