276 
Journal of Mycology 
[Vol. 10 
Polyporus subgiganteus B. & C., syn. of Grifolia berkleyi q. v. 
Polyporus subsericeus Peck, syn. of Coltricia cinnamomea q. v. 
Polyporus tabulaeformis Berk., syn. of Romellia sistotremoides 
q. v. 
Polyporus tomentosus Fr., syn. of Coltricia tomentosa q. v. 
Polyporus umbellatus Fr., syn. of Grifolia ramosissima q. v. 
Polystictus cinnamomeus (Jacq.) Sacc., syn. of Coltricia cinna- 
momea q. v. 
Polystictus dependens Sacc., syn. of Coltriciella dependens q. v. 
Polystictus licnoides Fr., syn. of Hapalopilus licnoides q. v. 
Polystictus obesus Ell. & Ev., syn. of Coltricia obesa q. v. 
Polystictus parvulus Fr., syn. of Coltricia parvula q. v. 
Polystictus perennis Karst., syn. of Coltricia perennis q. v. 
Polystictus purpureofuscus Cooke, syn. of Hapalopilus gilvus 
q. v. 
Polystictus sanguineus Fr., syn. of Pycnoporus sanguineum 
q. v. 
Polystictus schweinitzii Karst., syn. of Romellia sistotremoides 
q. v. 
Polystictus subglaber Ell. & McBr., syn. of Hapalopilus lic¬ 
noides q. v. 
Poplar log, rotten, host to Chondromyces catenulatus Thax. n. 
sp. Bot. Gaz. 37:410. June 1904. 
Poronidulus conchifer (Schw.) Murrill n. n. [Boletus con- 
chifer Schw., Boletus virgineus Schw.] Bull. Torr. Bot. 
Club, 311426. Aug. 1904. 
Poronidulus Murrill n. g. [Type, Boletus conchifer Schw.] 
Bull. Torr. Bot. Club, 311425. Aug. 1904. 
Potentilla anserina, host to Ramularia punctiformis Sacc. n. 
sp. Alaska, Har. Exped. 5:16. 5 April 1904. 
Powdery Mildews [popular, economic]. Byron D. Halsted and 
Tames A. Kelsey. N. J. Agr. Exp. Sta. An. Rep. for 1903 
517-536. PI. XII. 1904. 
Pseudopeziza cerastiorum arenariae Sacc. n. var., on dead leaves 
of Arenaria lateriflora. Alaska, Har. Exped. 5123. 5 
April 1904. 
Pseudovalsa ribesia Sacc. & Scalia n. sp., on dead corticated 
branches of Ribes laxiflorum, associated with Rhyncho- 
phoma, Godronia, Diaporthe, etc. Alaska, Har. Exped. 5 
29. 5 April 1904. 
Puccinia albiperidia Arthur. [Cultures on Ribes gracile. Hol- 
way.] Jour. Mycol. 10:163. July 1904. 
