Parasitic Fungi of Illinois. 175 



very short apiculus, epispore thick, conspicuously, though ra- 

 ther finely tuberculate, 21-27 by 30-48 n\ pedicel hyaline, 

 fragile, short. 



Cfconia (JEcidium) Claytoniatum, L. v. S. Almost simple and without 

 spots, occupying the whole leaf. Pseudoperidia broad, scattered. Spores 

 orange. Schw N. Am. Fung., No. 2892, p. 294. 



Puccinia Marix- Wilsoni, Clinton. Amphigenous ; spots none; sori 

 scattered or clustered unequal, at first covered by the epidermis, then 

 surrounded by its ruptured remains ; reddish brown ; spores subellip- 

 tical, scarcely constricted, crowned with a pustule, .0013-.001S in. long, 

 .0007-.0008 in. broad. Peck, 25 Rep. N. Y. State Mus. p. 115. 



On Claytonia Virginica : Both forms were collected at 

 Riverside, Illinois, near Chicago, June 2, 1883, by J. C. Arthur. 



This compound specific name ought not to be tolerated. 

 Whatever may be said of the Schweinitzian and other old 

 specific names composed of the binomial name of the host, 

 there is no excuse in such a case as the present for disregard- 

 ing a well-established and appropriate rule. 



In the accessible descriptions nothing is said of the tuber- 

 culate surface of the teleutospores. 



P. heterospora, B. & C. 



III. Spots purple, definite; sori hypogenous, small, densey 

 and definitely clustered, soon naked, ruptured, epidermis incon- 

 spicuous; spores subglobose or rarely elongated, mostly single- 

 celled, but frequently septate in any direction, epispore smooth, 

 gradually thickened toward the apex, diameter 18-27 i*', pedicel 

 hyaline, slender, diminishing below, about three to five times 

 the length of the spore. 



Sori minute, collected in orbicular groups, brown; spores subglo- 

 bose, with the pedicel attenuated down ward, subequal, at length septate. 

 Berkeley, Journ. Linn. Soc. Vol. X., p. 35ti. 



On Sida spinosa: Union, Sept. 17, 1882, 5033. F. S. 

 Earle. 



This is Uromyces pulcherrima, B. & C. (Grev. III. [1874] 

 p. 56, also U. ThwaitesiL B. & Br. Journ. Linn. Soc. XIV. 

 [1875] p. 92,). 



The original description by Berkeley and Curtis is in Jour. 

 Linn. Soc. X. [1869] p. 356. See A. B. Seymour, Botanical 

 Gazette, 1884, p. 357. 



