146 GEOLOGY OF OHIO. 



Myriophyw,um spicatum L. 



Generally distributed throughout the state. 



Myriophyi,lum TENEIAUM Bigelow. 



Northern Ohio, H. C. Beardslee ( Cat.) 



MVRIOPHYIAUM VERTICIIAATUM L. 



Cincinnati, J. L. Riddell (Synop. 1835) ; Joseph Clark (Cat. 1852.) 

 In the supplementary catalogue published a year later, Dr. Riddell makes the 

 statement that " M. verticillatum has not yet been discovered in our state." 



284. CALLITRICHE L. Water Star-wort. 



CaixiTriche heterophyu,a Pursh. 



Niles (Trumbull Co.) R. H. Ingraham; Lorain Co., A. A. Wright (Cat.) ; Paines- 

 ville, H. C. Beardslee (Cat.) 



Caujtriche verna L. 



Webbsport (Muskingum Co.) J. L. Riddell (Sup. Cat. 1836) ; "Common," H. C 

 Beardslee (Cat.) ; Lorain Co., A. A. Wright (Cat.) 



LVI. Order EUPHORBIACEAE- Spurge Family. 



285. EUPHORBIA L. Spurge. 



Euphorbia commutata Engelm 



Frequent throughout central and southern Ohio; Marblehead (Ottawa Co) 

 W. Krebs. 



Euphorbia coroixata L. 

 Throughout the state. 



Euphorbia cyperissias L. 



Occasionally met with along roadsides as an escape from cultivation. 



Euphorbia dentata Michx." 



" Southwestern Ohio," J. S. Newberry ( Cat.) 



Euphorbia hewoscopia L. 

 Painesville, O. Hacker. 



Euphorbia humistrata Engelm. 



Painesville, H. C. Beardslee (Cat.) ; Champaign Co-., Wm. C. Werner. 



■Euphorbia macui,ata L. 

 Common. 



Euphorbia marginata Pursh. 



Lorain Co., A. A. Wright (Cat); Cleveland, W. Krebs; Columbus, Aug. D. 

 Selby; Cincinnati, Jos. F.James (Bot. Gaz. II, 64.) 



Euphorbia nutans Lag. ( E. preslii Guss. ; E. hypericifolia L.) 

 Common. 



