|Cirsium congestissimum is a perennial
herb of 1-1.5m in height, inhabiting high-altitude grasslands, stems
erect and branching on upper portions. With sharp prickles on
margins, on-stem leaves are of alternate phyllotaxis, in an oblong
shape, measuring approximately 20cm in length, cleft to halfway.
Flower heads, around 2cm in height, with no peduncles, come out
densely on branch tips; the involucral bracts significantly bend
backward. Radical leaves are gone in the flowering time. Bloom time: