Notes For Reference:-

Species, Varieties, or Forms in the Genus Cirsium:
Cirsium bitchuense / Bicchuuazami
Cirsium buergeri / Himeazami
Cirsium chokaiense / Choushuuazami
Cirsium congestissimum / Hittsukiazami
Cirsium indefensum / Togenashiazami
Cirsium indefensum./ Izumoazami
Cirsium japonicum v. japonicum/Noazami
Cirsium japonicum var. japonicum f. albiflorum / Shirobananoazami
Circium mirabile / Obakeazami
Cirsium japonicum var. okiense / Okinoazami
Cirsium japonicum var. vestitum /

Cirsium japonicum var. okiense / Okinoazami オキノアザミ

Cirsium japonicum var. okiense is endemic to the Oki Islands off the coast of the Shimane Peninsula. The involucral bracts of this variety have sharper prickles compared to those of its elemental species, extending like needles. Within the Oki Islands, this variety is abundant, found on roadsides, in grasslands, rangelands, and other areas. Bloom time: May-August.