COMPOSITES. 



CARDUUS NUTANS (Thistle). 



17. CARDUUS (Thistle). 



1. C. nutans (Musk Thistle). Heads solitary, droop- 

 ing ; scales of the involucre tapering to a rigid point, 

 cottony, the outer ones bent back; stem winged by the 

 thorny leaves. Waste places ; common. A very hand- 



