PAPERS GIVING RUSTS OF NORTH AMERICA. 231 



leaves, bearing secia, which is labelled " yEciclium Podophyllat LvS 

 Sal & Beth." 



The rust is the aecial form of the long-cycle, autcecious species, 

 Piiccinia Podophylli Schw. (see no. 2939), on Podophyllum peltatmn 

 L. The combination JEcidimn (Ccroina) podophyllatum was made 

 on page 309 of the later work. 



*2889. 79. C. A. tenue, L.v.S., rather rare on leaves of Eupatorium agera- 

 toides, Bethlehem. 

 C. spots yellowish, evanescent, very delicate. Pseudoperidia sparse, 

 slightly elevated, but, what is peculiar, erumpent on both sur- 

 faces, closed on the upper, open on the under. Spores pale. 



Represented by a moimted portion of leaf, cut 3.5 cm. square, 

 bearing six or eight groups of secia, and by an empty packet, which 

 is labelled inside " ^cidium tenue Nobis In fol ignot Deetwiler," 

 and afterward " Eupat. agerat " substituted for " ignot," and is 

 labelled outside "iEcidium tenue in fol Eupat ageratoid Dettyler." 



This is the aecial form of Puccinia tenuis (Schw.) Burrill, an 

 autcecious rust. The name is written JEcidiuin {CcuoMia) tenue on 

 page 309 of the same work. 



*2890. 80. C. A. Euphorbise hypericifolife, L.v.S., frequent on leaves of E. 

 hypericifolia, Salem and Bethlehem. It is not identical with C. 

 Euphorbiatum Lk., nor does it make the leaves degenerate. 

 C. spots small, deep purple on the upper surface, yellowish on the 

 lower. Pseudoperidia aggregated, subconically elevated, and 

 somewhat excavated. Spores orange. 



Although this number is starred and the earlier work is not di- 

 rectly cited, yet the naming of Salem as a locality undoubtedly has 

 reference to Syn. Car. 455, which in fact must be considered the 

 basis of Schweinitz's new name. 



(455. 26. [^cidium] Euphorbise. Here and there on the leaves of 

 Euphorbia hypericifolia, but does not make them degenerate.) 



Represented by a mounted fragment of a leaf, about i cm. square, 

 well covered with aecia, and by an empty packet labelled " yEcidium 

 Eitphorb. hypericif Salem." 



