Cirsium
noun
Cir·si·um
ˈsərs(h)ēəm
: a widely distributed genus of prickly herbs (family Compositae) having the bristles of the pappus plumose compare carduus see bull thistle
Word History
Etymology
New Latin, from Greek kirsion, a thistle, probably from kirsos swollen vein; from the use of the thistle in antiquity in the treatment of swollen veins