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(Upload on November 3 2016) [ 日本語 | English ]

Datura L. (チョウセンアサガオ) Youshu-chousen-asagao (ヨウシュチョウセンアサガオ, 洋種朝鮮朝顔), Jimson weed or Devil's snare (アメリカチョウセンアサガオ) Lifeform: erect, annual forb, becoming 1.5 m tall Distribution: widespread in tropical and temperate regions in the world exotic to Japan (introduced in ca. 1870) Habitat: roadsides, waste lands, abandoned pastures, etc. Body: hairless Flower: pale violet ↔ D. metel: white Fruit (capsule): oval ↔ D. metel: spherical Poisons: tropane alkaloids (sometimes used as medicine)

Seed: black; dispersed by self, animal, wind and rain Chromosome number: 2n = 24 Synonyms: Datura tatura L. Datura stramonium L. var. tatura (L.) Torr. Datura stramonium L. var. chalybea W. D. J. Koch, sometimes used var. inermis (Juss. ex Jacq.) Schinz et Thell. (トゲナシチョウセンアサガオ), without spines on the fruits f. stramonium (シロバナチョウセンアサガオ), white flower f. tatura (L.) Dabert. (ヨウシュチョウセンアサガオ, s.s.)

Datura stramonium in Hokkaido

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[1-3] in a waste land near Muroran Marine Station, Muroran City, on September 12 2016.