PAPERS GIVING RUSTS OF NORTH AMERICA. 245 



the character of the surface, the veining, and the rough edges show 

 that these leaves could not have been those of Zisania. They do 

 suggest Andropogon, however, and in spite of being weathered, they 

 match well the leaves of A. scoparhts and A. virginicus. Moreover, 

 the teliospores, as well as a few urediniospores seen, agree fully with 

 Piiccinia Andropogonis, n. 291 1. While the two Andropogons 

 named can not be told apart by their leaves, we probably have to do 

 with A. virginicus which occurs on damp soil about Philadelphia. 



2916. 12. P. Smilacis, L.v.S., Syn. Car. 494, also in Pennsylvania. 



(494. 9. [Puccinia] Smilacis Sz. 



P. rather large, confluent, difform and stellate, dark fuscous, on 

 Smilax rotundifolia occupying all of the somewhat dried leaves.) 



Represented by an empty packet labelled " Puccinia Smilacis 

 LvS Salem." 



There is no doubt that this number is based upon the telia of the 

 common southern Smilax rust, still called Puccinia Smilacis Schw. 



2917. 13. P. Polygonorum Lk. n. 6, Syn. Car. 488, on P. pennsylvanicum and 



P. virginicum, also Pennsylvania. 

 (488. 3. [Puccinia] Polygoni Pensilvanici Sz. 



P. rather small, aggregated, somewhat elevated, chestnut brown, 

 opaque, at first closed, seated on pale spots, spores obovate-truncate. 



Frequent on Polygonum Pensylvanicum ; rendering the plants 

 sterile. Spores bilocular, pedicel short ; cells almost broader than 

 long, fuscous under a lens.) 



Represented by a packet containing two leaves, one about 3.5 by 

 5 cm., and the other somewhat smaller, bearing a few sori, which is 

 labelled " Puccinia Polygonorum P. virginicce LvS Salem & Beth." 



The leaves are ovate-lanceolate, smooth with ciliate margins, 

 and doubtless belong to Tovara virginiana (L.) Raf. {Polygonum 

 virginianum L.). The other host named was also correctly deter- 

 mined, without question. The rust is now given the earliest name 

 for it, P. P olygoni-amphibii Pers. 



*29i8. 14. P. concentrica, L.v.S., very frequent toward the end of autumn 

 on half alive and dead leaves of P. coccineum, Bethlehem. 

 P. spots very large, confluent, bright red on upper surface, paler on 

 the lower. Sori very crowded, aggregately concentric, at first 



