116 NORTH AMERICAN FLORA [VoLuME 7 
II. Uredinia hypophyllous, scattered on discolored areas, roundish, small, 0.1-0.2 mm. 
across, soon dehiscent by apical rupture; peridia as in aecia, but more delicate; uredinio- 
spores fusiform or ovate-fusiform, 12-17 by 35-504, acuminate above, with apex pro- 
longed into a tapering, pointed beak, 3-124 long; wall colorless, thin, 1 or less, smooth 
except the two distinctly echinulated lines of closely set, minute points. 
III. Teliospores scattered in the mesophyl of the leaf, globose, or somewhat broader 
than high, 25-29 broad by 20-23 high, 2-4-celled ; wall colorless, thin, 1“, smooth. 
ON POLYPODIACEAE : 
Lorinseria areolata (1,.) Presi (Woodwardia aveolata Moore), New Jersey, New York. 
Onoclea sensibilis I,., Connecticut, Illinois, Maine, Maryland, Massachusetts, New York, 
Pennsylvania, Wisconsin. 
TYPE LOCALITY: Sandlake, New York, on Oxoclea sensibilts. 
DISTRIBUTION : Maryland to Wisconsin and northward into Canada; also in Europe. 
ILLUSTRATION: Hedwigia 43: p1. 7. 
ExsiIccaTI: Rav. Fungi Car. 4: 97; Seym. & Earle, Econ. Fungi 88; Ellis & Ev. Fungi 
Columb. 1987. 
3. Uredinopsis Pteridis Dietel & Holway, Ber. Deuts. Bot. Ges. 
13: 331. 1895. 
Uvredo Pteridis Dietel & Holway, Erythea 2: 127. 1894. 
Milesia Pleridis Arth. Résult. Sci. Congr. Bot. Vienne 337. 1906. 
I. Aecia unknown. 
II. Uredinia hypophylious, roundish, large, 0.3-1 mm. across, bullate, light-yellow, 
tardily dehiscent by central rupture; peridium delicate; urediniospores oval or fusiform, 
11-18 by 30-58, apex acute, rarely tipped with a short, stout beak, 3-7» long; wall thin, 
1-1.5, colorless, smooth, or with a few scattered papillae, beside the two sharply defined 
longitudinal rows of loosely set papillae. 
III. Teliospores scattered in the mesophyl of the leaf, delicate, globoid, 1-4-celled, 
small, 19-27 # broad by 19-234 high; wall colorless, very thin, 0.75-1, smooth. 
ON POLYPODIACEAE : 
Pleridium aquilinum pubescens Underw., California, Washington. 
Pteridium caudatum (1,.) Maxon, Florida. 
TyPE LOCALITY: Pasadena, California, on ‘‘ Pleris aquilina.”’ 
DISTRIBUTION : Pacific coast of the United States; Florida. 
ILLUSTRATION: Ber. Deuts. Bot. Ges. 13: fi. 26, f. 10-11. 
4. Uredinopsis Copelandi Sydow, Ann. Myc. 2: 30. 1904. 
Milesia Copelandi Arth. Résult. Sci. Congr. Bot. Vienne 337. 1906. 
I. Aecia hypophyllous, hemispherical, minute, brown; peridium delicate ; aeciospores . 
polyhedral, 13-24 by 19-29 #; wall colorless, medium thick, 2-3, thicker at the angles, 
finely verrucose. 
II. Uredinia hypophyllous, scattered, minute, pale-brown; peridium opening by cen- 
tral rupture; urediniospores fusiform, 14-18 by 3140x, bluntly acute at apex or tipped 
with a short, stout beak, 3-74 long; wall thin, 1, colorless, smooth, except the two longi- 
tudinal lines of fine, closely set papillae. 
III. Teliospores imbedded in the mesophyl, 2-4-celled. 
ON POLYPODIACEAE : . ; 
” Athyrium cyclosorum Rupr., California. 
‘T'vPE LOCALITY : Sisson, California, on A¢hyrium cyclosorum. 
DISTRIBUTION: Northern California. 
ExsiccaTi: Sydow, Ured. 1790. 
5. Uredinopsis Struthiopteridis Stormer, Bot. Notiser 1895: 81. 1895. 
I. Aecia hypophyllous, scattered, roundish, bullate, 0.1-0.3 mm. across, pale yellow ; 
peridium strongly developed; aeciospores oblong or obovate, 15-18 by 28-39 «; wall color- 
less, thick, 2.5-3.54, much thicker at the angles, minutely verrucose, appearing smooth 
when wet. 
II. Uredinia hypophyllous, scattered on discolored areas, roundish, 0.1-0.3 mm, across, 
pale yellow, dehiscent by apical rupture; peridium as in aecia, but more delicate; uredinio- 
