Parr 2, 1907] UREDINACEAE 117 
spores fusiform or lanceolate, 12-16 by 35-454, acute or acuminate, with the apex pro- 
longed into a strong, tapering beak, 3-104 long; wall colorless, thin, 1, smooth, except 
the two longitudinal ridges, which appear finely serrated. 
III. Teliospores scattered in the mesophyl, globose, or somewhat broader than high, 
16-24 « broad by 14-22 high, 2-4-celled; wall colorless, thin, 1, smooth. 
ON POLYPODIACEAE : 
Anchistea virginica (L,.) Presl (Woodwardia virginica J. E. Smith), Vermont. 
Matteuccia Siruthiopteris (1,.) Tod. (Struthiopteris germanica Willd., Ouoclea Struthiop- 
teris Hoffm.), Newfoundland. 
TYPE LOCALITY: Marradalen near Copenhagen, Denmark, on Struthiopleris germanica. 
DISTRIBUTION : Northern New England and northward ; also in Europe. 
ILLUSTRATION: Ber. Deuts. Bot. Ges. 13: pl. 26, f. 5-9, 12-13. 
6. Uredinopsis Phegopteridis Arthur, sp. nov. 
I. Aecfa unknown. 
Il. Uredinia hypophyllous, scattered on discolored areas bounded by the veins, round- 
ish, bullate, very small, 0.1 mm. across or less, brownish-yellow, dehiscent by apical 
rupture; peridium delicate; urediniospores ovoid or fusiform, 10-16 by 29-58», acute or 
acuminate, prolonged into a very long and slender, sharp-pointed beak, 12-26» long; wall 
colorless, thin, 1“, smooth except the two longitudinal lines of closely set, minute papillae, 
scarcely visible even when dry. 
III. Teliospores numerous in the mesophyl, 2-4-celled, globoid, 15-19 in diameter ; 
wall colorless, thin, 1 or less, smooth. 
ON POLYPODIACEAE : 
Phegopteris Dryopteris (1,.) Fée, Wisconsin. 
Type collected in Vilas County, Wisconsin, July 28, 1902, J. J. Davis. 
7. Uredinopsis Atkinsonii Magn. Hedwigia 43: 123. 1904. 
Milesia Atkinsonii Arth. Résult. Sci. Congr. Bot. Vienne 337. 1906. 
I. Aecia hypophyllous, on pale spots, small, 0.1-0.3 mm. across; peridium strongly 
developed ; aeciospores oval or obovate, angular, 12-20 by 25-43, sometimes acute with a 
short mucro; wall colorless, rather thick, 1.5-2.5, closely and minutely rugose, appearing 
smooth when wet. 
II. Uredinia hypophyllous, on discolored areas, roundish, very small, 0.1-0.15 mm. 
across, pale yellow, dehiscent by central rupture ; peridium delicate; urediniospores ovoid 
or fusiform, 10-15 by 35-50, acute or acuminate, with the apex prolonged into a uniform 
beak, 5-15 long; wall colorless, thin, 1», smooth except the two longitudinal lines of 
obscurely defined, minute papillae, scarcely visible even when dry. 
III. Teliospores scattered in the mesophyl of the leaf, globoid, 13-20 by 16-294, 2-4- 
celled ; wall thin, 1, smooth, colorless. 
ON POLYPODIACEAE : 
Asplenium Filix-foemina (L.) Bernh., Massachusetts. 
Dryopteris Thelypteris (U.) A. Gray (Aspidium Thelypteris Sw.), Delaware, Massachu- 
setts, Michigan, New York, Wisconsin. _ ; 
TYPE LOCALITY : Cayuga Lake near Ithaca, New Vork, on Aspidium T. helypleris. 
DISTRIBUTION : Delaware to Wisconsin and northward. 
ILLUSTRATION : Hedwigia 43: pl. 2, f. 1-7. 
ExsiccaTr: Seym. & Earle, Econ. Fungi 2 7. 
11. MELAMPSOROPSIS (Schrot.) Arth. Résult. Sci. Congr. Bot. 
Vienne 338. 1906. 
Coleosporium § Melampsoropsis Schrét. Beitr. Biol. Pfl. 3:57. 1879. 
Cycle of development includes pycnia, aecia, uredinia and telia, with distinct alternat- 
ing phases ; heteroecious. Pycnia and other sori subepidermal. 
Pycnia deep-seated, somewhat erumpent, flask-shaped. 
Aecia erumpent, flattened laterally. Peridium firm, outer wall of cells greatly thick- 
ened and transversely striate, inner wall smooth. Aeciospores ellipsoid to globoid; wall 
colorless, coarsely verrucose with deciduous tubercles. 
