Parasitic FiiHfji of Illinois. 211 



Oronartium, 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 inemljrane. 



The peculiar column. com})osed of the elon^j'ated teleuto- 

 s))ores adhering closel}' 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. 

 Yar. thesii, Berk. 



n.. ITT. Uredosori small, scattered, or collected in irregu- 

 lar groups, furnished with aperidium; uredospores subglobose 

 to elliptical, echinulate, 15 by 18-27 p-\ teleutosori scattered, 

 often numerous, column long, cylindrical, usually curved: 

 teleutospores oblong or cylindrical, yellowish-brown, smooth, 

 about 11 fi- in diameter. 



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

 23. 1245; Boone, Sept. 2. 1428; LaSalle. Sept. IH. 14U8. Sept. 

 16. 1552; Ogle. Sept. 26. 6191). 



The determination of tlie variety was made by comparison 

 witli tlie specimens in Ellis' North American Fungi, No. 1082. 



This is Cromniiin)! coniatirlro'. Peck (Bot. (xaz. TV. 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 



