716 



UM BELLI FERAE 



Hydrocotyle 



50 



Map 1514 



Hydrocotyle americana L 



50 



Map 1516 



Sanicula gregana Bickn 



Flowers white; fruit flattened laterally. 



Leaflets toothed; stems streaked with purple or with bulblets in the 



axils of upper leaves 6011. Cicuta, p. 722. 



Leaflets entire; stems not streaked with purple, bulblets absent 



6036. Perideridia, p. 723. 



Flowers yellow; fruit flattened dorsally. 



Leaves once pinnate ; fruit broadly ovate, usually 5-7 mm long 



6120. Pastinaca, p. 727. 



Leaves 2 or 3 times pinnate; fruit slightly obovate, 6-10 mm long 



6102. POLYTAENIA, p. 727. 



5893. HYDROCOTYLE [Tourn.] L. Water Pennywort 



Leaves peltate 1. H. umbellata. 



Leaves not peltate. 



Umbels pedunculate; fruit sessile. (See excluded species no. 477, p. 1078) 



H. rotundifolia. 



Umbels sessile or nearly so ; fruit pedicellate 2. H. americana. 



1. Hydrocotyle umbellata L. Umbellate Pennywort. Map 1513. 

 Common on sandy beaches and in the outlets of a few lakes in the northern 



counties. 



N. S. to Fla., westw. to Ark. and Tex. ; also in Oreg. and Calif. 



2. Hydrocotyle americana L. American Pennywort. Map 1514. In 

 1933 I found a small colony of this species in the tamarack border of the 

 east side of Cogg Lake, Lagrange County. It grew in the shade in sphag- 

 num around the base of a small tamarack with Menyanthes, Sarracenia, 

 and Vaccinium macrocarpon. It was at maximum an thesis on July 15. 



This species was reported in 1878 from Jefferson County by Barnes, 

 but no data accompanied the report. There is a specimen in the herbarium 

 of Indiana University which was collected by Young in Jefferson County, 

 September, 1875. In 1935 it was again found in Jefferson County by 

 Miss Edna Banta. It was growing in shallow soil on a high ledge of rock 



