|Cirsium japonicum, a
perennial herb with a height of 0.5-1m, is the only thistle that
booms in the springtime and the most common across the country.
Leaves, pinnatifid radical ones at the bases of the plant, remain in
flowering time, and on-stem leaves, with sharp prickles on the
margins, embrace the stems with the ends. Flower heads, 4-5cm in
diameter, red-purple, bloom upwards. Involucres are 2-4cm
across-spherical shape; the bracts are sticky, facing straight
upward. Bloom time May-August.