IQ i 5 ] SHERFF—BIDENS 3 J 5 



My inability to find Michaux's specimen of his Coreopsis tricko- 

 sperma in the Michaux collection at Paris (in Herb. Mus. Nat. 



Fig. 3. — Type of Bidens coronata (L.) Britton in Herb. Linn. 



Hist. Paris) makes it impossible to state definitely whether Mi- 

 chaux's specimen was Bidens aurca (Ait.), as here introduced, or 



