A cluster of burdocks.
any of several plants (genus Arctium) of the composite family, with large basal leaves and purple-flowered heads covered with hooked prickles
Origin of burdockbur + dock
Any of several plants of the genus Arctium of the composite family, having edible roots and pink or purplish flower heads surrounded by prickly bracts that form burs.
Origin of burdockbur1 + dock4.