Peristrophe japonica




Family Acanthaceae
Subamily Acanthoideae
Scientific name Peristrophe japonica (Thunberg) Bremek
Synonyms Dicliptera japonica Makino; Dicliptera japonica var. subrotunda Matsuda; Peristrophe japonica (Thunb.) Bremek var. subrotunda (Matsuda) Murata & Terao
Common name (Japanese common name) haguro-sou (ハグロソウ, 葉黒草 [dark green leaves weed])
(English common name) waterwillow
Distribution (Japan) Honshu (west of Kanto region), Shikoku, Kyushu
(Other nations) Korea, China, Taiwan
Habitat Mountane forest
Chromosomal number 2n=48
Description Plants electing 20-50cm tall. Leaves 5-10cm long (including petioles), 1-3cm wide, bracts 1-2.5cm long. Flowers calyx 2.5-3mm long, pale purple corollas 2.5-3cm long, 2 stamens, flowering in July to October. Fruits 2.5mm long. Perennial plants.
Reference Dicliptera japonica (Thunb.) Makino
Delovery of small doses of ingestible treatments (WIPO Patent WO/2001/022934)



October 2006
at Koishikawa Botanic Garden
October 2006
at Koishikawa Botanic Garden
October 2006
at Koishikawa Botanic Garden