Journal oj Mycology 
266 
[Vol. 12 
Polyporus obtusus Berk., see Disease of Black Oaks caused 
by. . . 
Polyporus pini-canadensis Schw., syn. of Aurantiporus pilotae 
q. v. 
Polyporus pilotae Schw., syn. of Aurantiporus pilotae q. v. 
Poronia macrospora Peck n. sp., rich sandy ground in a gar¬ 
den. Bull. Torr. Bot. Club, 33:220. Apr. 1906. 
1 Powdery Mildews of Washington. W. H. Lawrence. Wash. 
State Agr. Exp. Sta. Bull. 70:1-16. 1905. 
Preliminary List of Higher Fungi collected in the vicinity of 
St. Louis, Mo., from 1898 to 1905. N. M. Glatfelter. Trans. 
Acad. Sci. St. Louis, 16:33-94. 14 Tune 1906. 
Prunus virginiana, host to Dichomera prunicola Ell. & Dearn. 
n. sp. No. 2021, Fungi Columbiana. 20 Mar. 1905. 
Psathyrella angusticips Peck, n. sp., grassy ground. Bull. 
Torr. Bot. Club, 33:217. April 1906. 
Pseudomonas vascularum, see Gumming of the Sugar-Cane. 
Pseudoperonospora cubensis Rostow, syn. of Peronoplasmopara 
cubensis q. v. 
Pseudoperonospora cubensis var. tweriensis, syn. of Peronoplas¬ 
mopara cubensis q. v. 
Pseudostegia Bubak n. g. Melanconiacearum. Jour. Mycol. 
12:56. Mar. 1906. 
Pseudostegia nubilosa Bubak n. sp, auf toten Slattern von Carex 
sp. Jour. Mycol. 12:56. Mar. 1906. 
Pseudostegia nubilosa (E. & E.) Bubak n. n. [Cryptosporium 
nubilosum E. & E.] Jour. Mycol. 12:56. Mar. 1906. 
Ptilosia lactucina, host to Puccinia ptilosiae Bubak n. sp. Jour. 
Mycol. 12:52. Mar. 1906. 
Puccinia aemulans Syd. n. sp., in foliis Gymnolomiae multi¬ 
florae. Ann. Mycolog. 4:31. Feb. 1906. 
Puccinia caricis-polystachyae Diet. n. sp., on Carex polystachya 
Wahl., [Mexico.] Ann. Mycolog. 4:3o6. Aug. 1906. 
Puccinia fuchsiae Syd. et Holw., in foliis vivis Fuchsiae thymi- 
foliae. [Mexico.] Ann. Mycolog. 4:30. Feb. 1906. 
Puccinia ptilosiae Bubak,^ auf Blaattern von Ptilosia lactucina. 
Jour. Mycol. 12:52. Mar. 1906. 
Puccinia solidaginis-mollis Diet. n. sp., on Solidago mollis Bartl. 
Ann. Mycolog. 4:308. Aug. 1906. 
Pyrenomyceteae, new or rare, see New or Rare. . . 
