146 GEOLOGY OF OHIO. 



Myriophyi^um SPICATUM L. 



Generally distributed throughout the state. 



Myriophyi^um teneeeum Bigelow. 



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



MYRIOPHYLEUM VERTlCnXATUM 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. 



CaeEITriche heterophyeea Pursh. 



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

 ville, H. C. Beardslee (Cat.) 



Caeeitriche verna L. 



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

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



LVL Order EUPHORBIACEAE. Spurge Family. 



285. EUPHORBIA L. Spurge. 



Euphorbia commutma Engelm 



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

 W. Krebs. 



Euphorbia coroeeata 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 heeioscopia L. 

 Painesville, O. Hacker. 



Euphorbia humistrata Engelm. 



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



Euphorbia macueata 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 Gxiss. ; E. hypericifolia L.) 

 Common. 



