122 GEOLOGY OF OHIO. 



166. ACERATES Ell. Green Milkweed. 



AceraTES floridana Lain. ( A. longifolia Ell.) 

 Huron Co., H. C. Beardslee (Cat.) 



ACERATES VIRIDIFLORA ( Raf.) Ell. 



Northern and central Ohio; Cincinnati, J. F. James. 



167. ASCLEPIAS L. Milkweed. 



Asclepias exai/TaTa ( L.) Muhl. ( A. phytolaccoid.es Ph.) 

 From Lake Erie to the Ohio River. 



ASCLEPIAS incarnaTa L. Swamp Milkweed. 

 Common. 



Asclepias incarnata pulchra Ehrh. 



Lorain Co., A. A. Wright (Cat.) ; Licking Co., H. L. Jones (Cat.) 



Asclepias obtusifolia Michx. 



"General," H. C. Beardslee (Cat.) 



Asclepias purpurascens L. Purple Milkweed. 

 Over the whole state, infrequent. 



Asclepias quadrifolia L. 



Throughout the state but not abundant. 



Asclepias sullivantii Engelm. 



Fairfield Co., W. A. Kellerman ; Licking Co., H. L. Jones (Cat.) 



Asclepias syriaca L {A. cornuti Decaisne.) 

 Everywhere. 



Asclepias Tuberosa L. Butterfly-weed. Pleurisy-root. 

 Widely distributed. 



Asclepias variegata L. 



Summit Co., Franklin Co., Wm. C. Werner. 



Asclepias verticdaata L. 



Marblehead ( Ottawa, Co.) E. Claassen ; Springfield, Mrs. E. J. Spence ; Fairfield 

 Co., W. A. Kellerman. 



168. VINCETOXICUM Moench. 



Vincetoxicum nigrum Moench. 

 Painesville, W. C. Werner. 



169. AMPELANUS Raf. {Enslenia Nutt) 



Ampelanus albidus (Nutt.) {Enslenia albida Nutt.) 

 Cincinnati, J. F. James (Cat,) 



