854 REPORT OF STATE GEOLOGIST. 



HALORAGIDACE.E. Water Millfoil Family. 



HIPPURIS L. 



H. vulgaris L. Mare's Tail. Joint-weed. 



This form,- somewhat northern in its general distribution, is re- 

 ported from two Indiana localities. The cypress swamps of Gib- 

 son and Posey counties, reported by Dr. J. Schneck, and from 

 Kosciusko County, by Stanley Coulter. Concerning the latter 

 reference there can be no doubt, as a careful study of the material 

 shows. Dr. Schneck preserved no specimens, but his well known 

 accuracy and the close connection he held with botanical centers 

 leads to a ready acceptance of his citation. These localities ex- 

 tend the southern limits of the species very decidedly, the present 

 limit being "the northern shore of Lake Superior." 



Laporte; Lake. 



PEOSERPINACA L. 



P. palustris L. Mermaid- weed. 



Reported only from Jefferson (J. M. Coulter); Noble (Van 

 Gorder); Gibson and Posey (Schneck); Kosciusko (Coulter). 



It should be looked for in July and will probably be found of 

 quite general distribution in the swamp regions of the northern 

 counties. 



MYRIOPHYLLUM L. 



M. spicatum L. Spiked Water Millfoil. 



Confined to the northern counties. Reported only from La- 

 porte (Barnes); Noble (Van Gorder), and Steuben (Bradner). 



M. verticillatum L. Whorled Water Millfoil. 



This form was added to State flora by W. S. Blatchley, who re- 

 ports it from Vigo County. 

 Steuben (Bradner). 



M. humile (Raf ) Morong. Low Water Millfoil. 

 (M. ambiguum Nutt.) 

 Perhaps the most variable form of the genus, at least within 

 our bounds. 



Reported from Jay, Delaware, Randolph, and Wayne (Phin- 

 ney); Gibson and Posey (Schneck). 



