Abstract
Two Asteraceae plants naturalized in Taiwan, Erechtites hieraciifolius (L.) Raf. ex DC. (Asteraceae),
and its variety, E. hieraciifolius (L.) Raf. ex DC. var. cacalioides (Fisch. Ex Spreng.)
Griseb., are described in this research note. Erechtites hieraciifolius is naturalized in the lowlands
of central and eastern Taiwan, while E. hieraciifolius var. cacalioides is naturalized in the lowlands
and low elevations of southern Taiwan and Lanyu (Orchid Island). Color photos and a distribution
map of E. hieraciifolius and E. hieraciifolius var. cacalioides are offered.