Apocynum APOCYNACEAE— ASCLEPIADACEAE Asclepias 



Apocynum L. Dogbane. 



/" A. androsaemifolium L. Spreading Dogbane. 



Infrequent, in dry ground, Piedmont and Coastal Plain areas 

 of New Castle County. Mid-June, July. ilcw*-^ ^ aa-C . 



A. cannabinum L. Hemp Dogbane. 



Common throughout, at least as far south as Accomac County, 

 preferring sandy soil. Late May, June. 



Var. pubescens (R. Br.) DC. 



Frequent; same habitats, but apparently limited to the 

 Coastal Plain. 



Var. glaberrimum A. DC. 



One collection: roadside thicket, just south of Sassafras 

 (Ke), R. R. Tatnall, 4899, 23 July 1941 (T, G). 



Var. hypericifolium (Ait.) Gray. 



Reported (in MS Catalog) as collected by E. Tatnall at 

 Hamburg Cove (NC), and at Edgemoor (NC), in 1894. No 

 specimens seen. 



A. medium Greene. 



Rare: near Centreville (NC), Commons in 1876 (A); fields, 

 Wilmington, Commons, 18 June 1897 (A); Rehoboth (S), C. S. 

 Williamson,8 July 1908 (A). " . 



Perhaps a hybrid, A. androsaemifolium X A. cannabinum. 



A. sibiricum Jacq. 



Infrequent, on shores of Delaware River (NC), and Susquehanna 

 River (Ce). 



Var. sarniense (Greene) Woodson. 



One collection: in bed of Susquehanna River, Conowingo 

 (Ce), Pennell, 1573, 1 July 1914 (A). Locahty now submerged. 



ASCLEPIADACEAE (Milkweed Family) 



Asclepias L. Milkweed. 



A. tuberosa L. Butterfly- weed. 



Common in dry soil of the Piedmont, and southward on the 

 Coastal Plain, at least to Wicomico County. July, early Aug. 



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