208 IJlinois Staff Laboratonj of NafinrtI History. 



Ph. rubi, (Pers.) Winter. 



IT., III. Hypophyllous. Sori, very small, scattered; ure- 

 dosori often very numerous, circular, orange-yellow, without 

 paraphyses; uredospores ovate or elliptical, each borne upon a 

 pedicel, epispore thin, finely echinulate, 12-15 by 15-20 (*■-, te- 

 leutosori rounded, sometimes conflnent, black; teleutospores 

 about four to five septate, cylindrical, somewhat constricted at 

 the septum, ends obtusely rounded, the vertex furnished with a 

 conical, more or less deeply tinted apiculus, surface finely tu- 

 berculate, sometimes appearing smooth, dark-brown, 36 by 100 

 /<; pedicel as long as the spore or somewhat longer, very much 

 swollen in the lower half. 



On NiiJnts rillosus: Lee, Sept. 8, 5711, II., ITT.; .ToDaviess, 

 8ept. 15, 5008, Tl.; Sept. 18. 5979,11., Sept. 19, 5999,11.; Ogle, 

 Sept. 23, 6147, IT.; Jersey, Oct. 14. 6313, IT.; McLean. Oct. 18, 

 1874. IT. 



Triphragmium, Link. 



Teleutospores dark brown, three-celled, triangular, the di- 

 viding septa vertical and horizontal or oblique; uredospores 

 similar to those of Purc'niia. 



In this genus a3cidioforms have not been certainly recog- 

 nized, though there are in some cases what have been called 

 two forms of the uredo. the one occurring in the spring on the 

 ])etioles and veins, the other late in the summer on the leaf 

 surfaces, and s])ermogonia are develo])ed u])on the upper leaf- 

 surface. 



The si)ecies are comparatively few; none have so far been 

 found in Illinois. 



Ravenelia, Berkeley. 



Teleutospores many-celled, berry-like, with vertical and 

 horizontal septa, usually Avith a series of hyaline cells at the 

 base, pedicellate or sessile. 



This curious genus is coni])aratively little known, and its 

 standing among the Vn'dinca- has not been firmly established. 



