<^' 



70 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



plants often tinged with brown; ventral lobes of stem 

 leaves arching partially or whollj- across the axis, and 

 attached by a short oblique line; leaf cells with distinct 



trigones ; dioicous R. tenax 



2. Subfloral innovations usually none R. complanata ' 



Subfloral innovations single or double R. obconica 



Radula complanata (L.) Dumort. ']o'2. 



On rocks and trunks of trees. May and June. Litch- 

 field: Goshen, Underzuood; New Milford, Evans. Hart- 

 ford : Windsor, W. E. Britton. Windham : Canterbury, 

 £\o Mrs. Hadley. Fairfield: Redding, Miss Hayncs; Sherman, 

 Evans. New Haven : Cheshire, Harger; Hamden and New 

 Haven (1866), Eaton; North Haven, Orange, and Seymour, 

 Evans. Middlesex : Killingworth and IVIiddlefield, Evans. 



Ref. Eaton, 15, 70. Evans, 28, 172. 



Quebec to Alaska, south to Florida, Louisiana, and Cali- 

 fornia ; Europe ; Asia ; northern Africa. 



Radula obconica Sull. ^oc 



On shaded rocks in ravines. Fairfield: Redding, Evans. 

 New Haven: Hamden (1891), Evans; Oxford, Harger. 

 Middlesex: Killingworth, Nichols. 



Connecticut west to Ohio and south to Georgia. 



Ref. Evans, 26, 213; 28, 172. 



Radula tenax Lindb. ic '\ [ 



On shaded rocks. Litchfield: Salisbury, Miss Lorens; 

 Fairfield : Redding, Miss Hayncs. New Haven : Bran- 

 ford and Naugatuck (1890), Evans. 



New England to North Carolina. ' ' 



Ref. Evans, 28, 172. 



Porella (Dill.) L. 



1. Ventral lobes lingulate-oblong, closely appressed to the 

 stem or to the dorsal lobes P. pinnata 



Ventral lobes broadly ovate to oblong 2 



2. Ventral lobes slightly or not at all decurrent; underleaves 

 contiguous or slightly imbricated P. platyphylla 



Ventral lobes Jong-decurrent; underleaves distant.. P. rivularis 



