Triodanis perfoliata

Basic information
Scientific name	Triodanis perfoliata	Click to magnify
Major synonym	Specularia perfoliata
Common names	Common nenus’ Looking-glass
Higher taxon	Campanulaceae, Campanulales, Magnoliopsida, Magnoliophyta
Natural range	North America.
Habitat	Roadside, lawn field, farm area, etc.

Invasion information
Range in Japan	Middle to western Japan (Fukushima Pref. and southern part)
Origin	Unknown.
Date	There is a specimen of 1911 from Tokyo.
Route	Deliberate: As ornamental plant.
Impact	Potentially: Competition with native species, crops, lawn grass, etc. Native organism(s) affected: Native plants, crops, lawn grasses, etc.
Regulation in Japan	No action for prevention, mitigation, control, or eradication.
Introduced range in other countries	Unknown.

Reference	Notes
Osada (1976) Colored Illustrations of Naturalized Plants of Japan. Hoikusha, Osaka (in Jpn) Satake et al. (1981) Wild Flowers of Japan, Herbaceous Plants [III]. Heibonsha, Tokyo (in Jpn) Shimizu (ed) (2003) Naturalized Plants of Japan. Heibonsha, Tokyo (in Jpn) etc.