burr of teasel comb (dispacus sylvestris)

barbed biennial bur cocklebur comb cover curly danger defense defensive diagonal dipsacaceae dispacus dried dry fall family flower fruit genus guard hard herbaceous hook hurt irritant natural nature needle pain passing pin plant preserve prickle protection protective seasonal seed sharp spear spiky stick sting stingy sylvestris teasel teazel teazle teeth thistle thorn thorny three vegetation