PAPERS GIVING RUSTS OF NORTH AMERICA. 219 



(445. 16. [yEcidium] Verbesinse Sz. 



A. oval, rather thick, small, pale reddish yellow, peridia few, 

 prominent, white. 



Frequent on Verbesina, Sigesbeckia, and others. Spots four 

 lines in diameter. Spores simple, very small, pale, margins of the 

 peridia entire.) 

 (446. 17. [^cidium] Solidaginis Sz. 



A. effuse, rather large, peridia scattered, minute. 



Frequent on stems of Solidagos before flowering. Similar to the 

 preceding.) 



Neither specimens nor packets remain to represent these entries. 

 Schweinitz was right in putting the Solidago aecia with those on 

 Aster. They go with the Aster-Solidago-Erigcron-Carex combina- 

 tion lately passing under the name, Piiccmia c.vtensicola Plowr., 

 along W'ith the preceding number, one belonging to the physiological 

 race, Puccinia Caricis-Asteris, and the other to that of P. Caricis- 

 Solidaginis as abundantly indicated by cultures. The present ac- 

 cepted name is Puccinia Aster um (Schw.) Kern. 



He was also right in excluding A. HeliantJii-mollis, here given 

 under the subsequent number; but he was wrong in retaining A. 

 Verhcsincc. The Verbesina aecia belong with the autcecious rust 

 Puccinia Vcrhesina: Schw. (see no. 2925), a rust which is common 

 throughout the southern states. All collections of this species ap- 

 pear to be on V. occidentalis (L.) Walt., which doubtless was the 

 host of Schweinitz's no. 445. No rust has yet come to hand on 

 Siegesheckia (Actiuotncris), and the inclusion of the name must 

 have been due to an assumption not supported by collections. 

 Schweinitz claimed authorship of this species, hence places his 

 initials after the name, although Link was the first to write it in this 

 form, as Schweinitz was well aware. The name was written by 

 Schweinitz JEcidium (Cceojim) asteratiim on page 309 of his later 

 work. 



2871. 61. C. A. Helianthatum, L.v.S., Syn. Car. 450, frequent on H. mollis. 

 Rare in Pennsylvania. 

 (450. 21. [^cidium] Helianthi mollis Sz. 



A. oblong, thick, whitish, peridia congested, pale, spores oblong. 

 Frequent on the under side of the leaves of Helianthus mollis ; 



