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



mycelium, protruding in tufts through the stomates. Figs. 

 16-18, 30-34. 



About 70 species have been described, of which 25 occur 

 in North America. Of the latter, four occur on cultivated 

 hosts, but are not of especial economic importance. So far 8 

 species have been reported in Connecticut. 



Key to Species of Entyloma. 



I. Spores dark tinted, reddish brown, often, adhering to- 

 gether. 

 A. Sori forming minute, black, oblong or linear striae. 



1. Spores golden brown, 7-1 ifx E. lineatum. 



2. Spores darker brown, 8-14^... E. crastophilum. 

 II. Spores hyaline or yellowish tinted; sori forming discol- 

 ored spots. 



A. Spores not apiculate, often adhering somewhat. 



1. With hypophyllous conidia or sporidia. 



a. Sori yellowish or reddish brown, 1-2 mm. 



E. Thalictri. 



b. Sori whitish or yellowish, 1-10 mm 



E. Lobelice. 



c. Sori yellowish or reddish, often bordered, 



y 2 -6 mm E. Physalidis. 



2. Usually without conidia. 



a. Sori light yellowish, y 2 -2 mm. . .E. Linaria. 



b. Sori yellowish or reddish brown, 2-5 mm. . . 



E. polysporum. 



B. Spores apiculate and pedicellate, never adhering ; sori 



yellowish, later reddish brown E. Nymphaa. 



Entyloma lineatum (Cke.) Davis. Figs. 16, 32. The 

 sori occur in the leaves, leaf sheaths, or occasionally in the 

 culm, and are small, ^-3 mm. in length, subcircular to 

 (chiefly) linear, scattered or fusing somewhat, lead-colored 

 or black, and rather permanently covered by the epidermis. 

 The spores are light golden brown, firmly agglutinated, usually 

 ovoid to subspherical or somewhat polyhedral, smooth, and 

 7-1 ifi in length. 



