Sept. 1907] Index to North American Mycology 227 



Pleosphaeria fairmaniana Sacc. n. sp. in ligno carioso indurato 

 Ulmi americanae. Jour. Mycol. 13 45. Mar. 1907. 



Polygonum newberryi, host to Ustilago punctata Clinton n. sp. 

 N. A. Flora, 7:23. 4 Oct. 1906. 



Polymorphism of Hymenomycetes, Culture Studies on. George 

 Richard Lyman. Proc. Boston Soc. Nat. Hist 33:125-209. 

 pi. 18-26. Feb. 1907. 



Prescot, C. S., Secretary Society of Bacteriologists. 8th An- 

 nual Meeting. [Titles and abstracts of papers]. Science N. 

 S. 25 :8o5-820. May 24, 1907. 



Prunus serotina, host to Zygodesmus avellaneus Sacc. n. sp. 

 Jour. Mycol. 13:48. Mar. 1907. 



Ps.\thyrella [Monograph; Morgan], see North American 

 Species of Agaricaceae [Monograph]. . . . 



Puccinia arabicola E. & E. Jour. Mycol. 6:119, 191, [is Puc- 

 cinia plumbaria Peck on Phlox not Arabis. Holway]. Hol- 

 way's N. A. Uredin. i :47. 15 May 1906. 



Puccinia euphorbiae intumenscens Syd., syn. of Puccinia intu- 

 m esc ens q. v. 



Puccinia eurotiae Grififiths n. sp. on Eurotia lanata Moq. Bull. 

 Torr. Bot. Club, 34::2io. April 1907. 



Puccinia glabella Holway n. sp. on Boisduvalia glabella (Nutt). 

 Walp. Holway's N. A. Uredin. 1.76. 10 May 1907. 



Puccinia intumescens Holway, new comb. [Puccinia euphor- 

 biae intumescens Syd.] Holway's N. A. Uredin. i :6o. 10 

 May 1907. 



Puccinia lithophragmae Holway n. sp. on Lithophragma parvi- 

 flora (Hook.) Nutt. Holway's N. A. Ured. 1:51. 15 May 

 1906. 



Puccinia ludwigiae (E. & E.) Holway n. comb. [Aecidium 

 ludwigiae E. & E. ; Puccinia nesaeae E. & E. ; Dicaeoma 

 nesaeae Kuntze ; Allodus nesaeae Artk.] Holway's N. A. 

 Uredin. i :72. 10 May 1907. 



Puccinia melothriae Stevens n. sp. on Melothria pendula L. Bot. 

 Gaz. 43 :283. April 1907. 



Puccinia on Melothria [P. melothriae n. sp.]. F. L. Stevens. 

 Bot. Gaz. 43 :282-3. April 1907. 



Puccinia nesaeae E. & E., syn. of Puccinia ludzvigiae q. v. 



Puccinia obliqua B. C. Jour. Linn. Soc. 10:356, 1869, [appears 

 to be P. lateritia B. & C. on some of the Rubiaceae. Hol- 

 way]. Holway's N. A. Uredin. 1:43. 15 May 1906. 



{To he continued.) 



