PAPERS GIVING RUSTS OF NORTH AMERICA. 239 



Represented 1)\- four leaves, one of tln-in 4 by 6 cm., the others 

 trimmed down to that size from hirger leaves, mounted loose in a 

 packet, bearing seven characteristic galls, and l)y an original packet 

 with ci^ht similar leavi'S, 4-7 cm. long, having bleached spots but 

 no rust, which is labelled ".-Ecidium (Ceratites) Botryapii LvS 

 Bcthl 1830." 



'I'lu' rust is the .Tcial stage of Cyiiniosporangium botryapites 

 (Schw.) Kern. At page 310 of the same work Schweinitz changed 

 the name to Ceratites (Ccconio) botryapites. The asterisk was er- 

 roneously omitted from this number. 



8. Subgen. rERiDEimiuM. 



2903. 93. C. P. Pineum, Lk. 175, Syn. Car. 456. In Pennsylvania near 



Pliiladelpliia and elsewlicre, not rare. Specimens aiTi()Ic, a foot 



long, found by me on the trunk itself of Pinus inops, suggesting 



a resemblance to Gymnosporangium Juniperini. 



(456. 27. f/Ecidiuin] Pini. Rare with us, and only on young 



leaves.) 



Represented by two specimens. One of these consists of the sec- 

 tion of a woody gall, 3 cm. across, mounted, with an empty packet, 

 labelled " Casoma Peridermium Pini in Ligno Philad." A similar 

 portion of a gall is in the Michener collection at Washington, prop- 

 erty of the U. S. Department of Agriculture. 



The other consists of about a dozen slender leaves from a 2-leaved 

 pine, none full length, now about 5.5 cm. long, mounted loose in a 

 packet, bearing a few ?ecia. with an empty packet, labelled " Cseoma 

 Peridermium Pini in acubus Salem." 



Microscopic examination shows the woody form to be Perider- 

 niiioii cerebrum Peck, the fecial stage of Cronartinm Qiicrciis 

 (Brond.) Schrcit., and the leaf form to be P. iiifcniicdiiiiii Arth. & 

 Kern. 



*2Q04. 94. C. P. germinale. L.v.S.. very rare on tiic fruits of roses. Com- 

 municated to me by Mr. Collins. 

 C. pseudoperidia very long, cylindric. somewhat compressed, at 

 length white, fimbriate, divisions cleft to the bottom, free. 

 Spores effuse, pale. Pseudoperidia rising from httie pits in the 

 fruit, without any spot, usually three lines long. 



