I'tn-asitic Fungi of Illinois. 211 



CRONABTIUM, FRIES. 



Teleutospores one-celled, without pedicels, compacted in an 

 erect (often curved or bent) cylindrical, solid column; uredo- 

 spores produced on pedicels, the uredosorus covered by a pseudo- 

 parenchymatous membrane. 



The peculiar column, composed of the elongated teleuto- 

 spores adhering closely to each other, and rising conspicuously 

 from the substratum, clearly designates this genus. The 

 uredospores and teleutospores, so far as known, are produced 

 on the same host, sometimes in the same sorus. 



C. asclepiadeum, Kze. 

 Var. thesii, Berk. 



II., III. Uredosori small, scattered, or collected in irregu- 

 lar groups, furnished with a peridium; uredospores subglobose 

 to elliptical ; echinulate, 15 by 18-27 /*; teleutosori scattered, 

 often numerous, column long, cylindrical, usually curved; 

 teleutospores oblong or cylindrical, yellowish-brown, smooth, 

 about 11 P in diameter. 



On Comandra nmbellata: McHenry, Aug. 20, 1157, Aug. 

 23, 1245; Boone; Sept. 2, 1428; LaSalle, Sept. 13, 1498, Sept. 

 16, 1552; Ogle, Sept. 26, 6199. 



The determination of the variety was made by comparison 

 with the specimens in Ellis' North American Fungi, No. 1082. 



This is Cronartium comandrw, Peck (Bot. Gaz. IV. p. 128). 



MELAMPSORA, CAST. 



Teleutospores one or more celled, when divided the septa 

 mostly vertical (sometimes horizontal or oblique), sessile, densely 

 compacted in a firm, flat or slightly convex layer; uredospores 

 single celled, sessile upon the hymenium, the sori usually cov- 

 ered by a membrane, which is finally irregularly ruptured. 



This genus, as here defined, includes not only what has 

 been uniformly assigned to it, but the species which have been 



