bullweed

Etymology

bole (“a stem”) + weed

bullweed means Knapweed. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

Knapweed.“For this reason it is most excellent practice to mow the weeds of Lambsquarter, Ragweed, Hog Ragweed, Bullweed, Artichoke, and in fact all other weeds large enough to sustain such borers – mowing them about the middle of the summer and again the latter part of August.”