May 1904 ] Index to North American Mycology 141 
Peck, Charles H. Report of the Botanist 1902. N. Y. State 
Mus. [Botany 6] Bull. 67:1-194. PI. M. N. 82-4. 1903. 
Pelodiscus miniatus Clements, syn. of Lachnea clementsi q. v. 
Pelodiscus piliseta Clements, syn. of Lachnea piliseta q. v. 
Peltigera. [Popular descriptions and (3) figures of 8 species.] 
Carolyn W. Harris. Bryologist, 7:1-4. Jan. 1904. 
Penicillium pallidofulvum Peck n. sp., parasitic on Lactarius 
deceptivus. N. Y. State Mus. Bull. 67:30. 1903. 
Pennsylvania Slime Moulds [list], see Slime Moulds of. . . 
Peronospora (Plasmopara) cubensis B. & C., syn. of Pseudo- 
peronospora cubensis q. v. 
Peronosporaceae, Key to the genera. [Bessey.] Trans. Am.. 
Micr. Soc. 24:45. Nov. 1903. 
Pertusaria pocillaria Cummings n. sp., on Almus. Alaska, Har. 
Exped. 5, 101. PI. IX. 1904. 
Peziza (Humaria) fuscocarpa (Ell. & Holw.), syn. of Aleurina 
fuscocarpa q. v. 
Pezizella subcinerea Rehm n. sp., ad lignum putridum. Ann. 
Mycolog. 2:37. Jan. 1904. 
Phallus ravanelii, Observations on. Howard J. Banker. Tor- 
reya, 4:5-8. Jan. 1904. 
Phoma and Phyllosticta on the Sugar Beet, Proof of the Identity 
of. Geo. G. Hedgcock. Jour. Mycol. 10:2-3. Jan. 1904. 
[Abstract in Science N. S. 19:172. 29 Jan. 1904.] 
Phoma astericola Atks., syn. of Macrophoma astericola q. v. 
Phoma farlowiana Viala et Sauv., syn. of Macrophoma far- 
lozviana q. v. 
Phoma obscurans E. & E., syn. of Phyllosticta obscurans q. v. 
Phoma psoraleae Cke., syn. of Phyllosticta psorleae q. v. 
Phoma virginiana Ell. & Halst., syn. of Phyllosticta virginiana 
q. v. 
Phragmidium affine Syd. n. sp., in foliis vivis Potentillae blasch- 
keanae. Ann. Mycolog. 2:29. Jan. 1904. 
Phycomycetes, The Structure and Classification of. Charles E. 
Bessey. Trans. Am. Micr. Soc. 24:27-54. PI. II. Nov. 
1903. 
Phylogeny of the Lichens. [Abstract.] F. E. Clements. 
Science, N. S. 19:171. 29 Jan. 1904. 
Phyllohendersonia FI. Tassi n. n. [Hendersonia,— sporule 
di lunghezza inferiore a 15 [x; peritheci foliicoli — maculi- 
coli.] Bull. Lab. ed Orto Bot. Siena, 5:7, 53. 1902. 
Phyllohendersonia concentricia (E. & E.) FI. Tassi n. n. 
[Hendersonia concentricia E. & E.] Bull. Lab. ed Orto Bot. 
Siena, 5 :53- 1902. 
