| Family | Asteraceae (alt. Compositae) |
| Scientific name | Cirsium nipponicum (Maximovicz) Makino var. comosum (Franchet et Savatier) Kitamura |
| Synonyms | Cirsium comosum (Franchet & Savatier) Matsumura |
| Common name | (Japanese common name) iga azami (イガアザミ, 毬薊 [meaning: iga azami (azami = thistle, iga = spinelike bracts of Castanea crenata)]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (Kanto region) |
| (Other nations) none | |
| Habitat | Beach (Pacific Ocean) |
| Chromosomal number | unknown |
| Description | Plants 100-200cm tall. Flowers involucres 25-30mm, flowering in September to November. Perennial plants. |
| Note | Native to Japan |
| Some authors may describe that Cirsium nipponicum (Maximovicz) Makino var. comosum (Franchet et Savatier) Kitamura is a synonym of Cirsium nipponicum (Maximovicz) Makino var. incomptum (Maximovicz) Kitamura. |
| October 2007 at Tsukuba Botanical Garden |
October 2006 at Tsukuba Botanical Garden |
October 2006 at Tsukuba Botanical Garden |
| October 2007 at Tsukuba Botanical Garden |
October 2007 at Tsukuba Botanical Garden |
October 2006 at Tsukuba Botanical Garden |