- Scientific Name: Deinostema violacea (Maxim.) T. Yamaz.
- Ref: J. Jap. Bot. 28: 132. 1953.
- Synonyms: Gratiola violacea Maxim., Mélanges Biol. Bull. Phys.-Math. Acad. Imp. Sci. Saint-Pétersbourg 9: 407. 1874.
- Chinese Common Name: 泽番椒 ze fan jiao
- Japanese Common Name: サワトウガラシ 沢唐辛子
- Family: Scrophulariaceae, Plantaginaceae
- Genus: Deinostema
- Distribution: Swamps. Heilongjiang, Jiangsu (Jurong Xian), Jiangxi, Jilin, Liaoning, Zhejiang [Japan, Korea, Russia (Far East)].
- Type: Hab. in Japoniae (a bot. indigeno s. nom. midzu to-garasi cum Sieboldo! communicata) ins. Kiusiu: prov. Simabara, fine Septembris fl. c. fr. fere mat., in ripa lacus prope Oyo, in consortio Vandelliae erectae, fine Julii fl.
Annuals. Stems slender, ca. 20 cm tall, glabrous. Leaves linear-subulate, to 10 X 1 mm, margin entire. Pedicel to 4 mm. Calyx 3-5 mm in fruit; lobes subulate. Capsule ovoid-ellipsoid, ca. 2 mm. Seeds yellow-brown, ca. 0.5 mm.(Flora of China)
