MICHIGAN WEEDS. 



425 





Fig. 220 (192). 



Common or Bull Thistle. Cirsium lanceolatum (L.) Hill. (Carduus lanceolatus L.) A stout, woolly, 

 branched biennial, 90-150 cm. high; leaves variably lobed, extending down the stem (decurrent), 

 everywhere each wavy lobe^termi nates in a formidable prickle; heads large, mostly solitary, the scales 

 of the involucre each terminating in a bristly prickle. 



