BOTANY. 89 



Siephium eaciniatum L. Rosin-weed. Compass-Plant. 



Given for Ohio in former catalogues. We have seen no specimens. 



Siephium perFoeiatum L. Cup-Plant. 



Common throughout western half of the state. Painesville, H. C. Beardslee 



(Cat.) 



Silphium TEREBhstthinaceum L. Prairie Dock. 



Throughout the western half of the state, from Lake Brie to the Ohio River. 



SlEPHIUM TEREBINTHINACEUM PINNATIFIDTJM ( Ell. ) Gray. 



"Darby Plains, O.," J. L. Riddell (Synop. 1835); Fairfield Co., W. A. Kellerman ; 

 Springfield, Mrs. E. Jane Spence ; Loudon, Mrs. K. D. Sharpe. 



SlEPHIUM TRIFOUATUM L 

 Throughout the state. 



21. PARTHENIUM L. 



Parthenium hysterophorus L. 



Grounds of Sell's Bros. Circus, (near Columbus) ; W. J. Green. 



22. AMBROSIA Tourn. Ragweed. 



Ambrosia arTEMISiaefoeia L. Roman Wormwood. Hog-weed. Bitter-weed. 

 Common everywhere in fields and waste-places and along roadsides. 



Ambrosia trifida L. Great Rag-weed. 



Common in low grounds and along streams all over the state. 



Ambrosia Trifida integrifolia (Muhl.) Torr. and Gray. 

 With the ordinary form. 



23. XANTHIUM Tourn. Cockeebur. Ceotbur. 



Xanthitjm canadknse Mill. 

 Everywhere over the state. 



Xanthium canadense ECHinaxum ( Murr. ) Gray. 



Lorain Co., A. A. Wright (Cat.) ; Columbus, Aug. D. Selby. 



Xanthium spinosum L. 



Dayton, H. A. Surface, Mrs. E.Jane Sp:nce; Cincinnati, Jos. F. James (Cat.) 



Xanthium strumarium L. 



Cincinnati, Jos. F. James (Cat) ; Franklin Co., Selby and Craig (Cat.) 



24. HELIOPSIS Pers. Ox-eye. 



Heeiopsis heeianthoides (L. ) B. S. P. {H. laevis Pers.) 

 Common all over the state. 



