00 Miller — The Dogbanes of the Didrid of Cohutdna. 



EXPLANATION OF PLATE IL 



(All fi Inures three times natural size ) 



Fig. 1. Ajiitcijniiiii androsxmifolium Linn;eus, from Maryland. 



Fig. 2. Apocynuiii sjjeciosum Miller, topotype. 



Fig. ?>. Aj)ocijiiitm )iiedUun Greene, topotype. 



Fig. 4. Ajioci/num urceolifer Miller, topotype. 



F'ig. 5. Apocyiinm album Greene, topotype. 



Fig. 0. Apncynum camiahimuii Linnsens, large-flowered form, from Ken- 

 sington, Maryland. 



Fig. 7. Apocij)utm caniiabinnm Uinuivus, smaW flowered form, from Capitol 

 View Park, Maryland. 



