Cirsium toyoshimae Koidz.

Toyoshima’s Thistle (Cirsium toyoshimae)

Toyoshima’s Thistle was probably endemic to the island of Chichijima in the Ogasawara Islands, Japan, and appears to be known exclusively from herbarium sheets.

The plant had a basic rosette of larger oak leaf-like shaped leaves, the flowers were about 2 to 2,5 cm in diameter and appear to have been yellowish.

The species was never seen since 1936 and is almost certainly extinct. [1]



[1] Tetsuto Abe; Katsuyuki Wada; Nobukazu Nakagoshi: Extinction threats of a narrowly endemic shrub, Stachyurus macrocarpus (Stachyuraceae) in the Ogasawara Islands. Plant Ecology 198: 169-183. 2008


edited: 14.01.2019