Part 2, 1907] UREDINACEAE 113 
II. Uredinia hypophyllous, scattered, bullate, irregularly rounded or oblong, rather 
small, 0.2-0.4 mm. across, tardily dehiscent by irregular rupture, golden-yellow, somewhat 
pulverulent ; peridium rudimentary, delicate ; urediniospores globoid or elliptical-globoid, 
14-20 by 19-30; wall colorless, thin, 1-1.5 p, minutely verrucose, appearing smooth when 
wet, pores 4, equatorial. 
III. Telia hypophyllous on yellow spots; teliospores in epidermal cells, 2-4-celled, 
globoid, 14-18 in diameter; wall thin, colorless, with apical pore. 
ON POLYPODIACEAE : 
Filix bulbifera (1,.) Underw. (Cystopteris bulbifera Bernh.), Wisconsin. 
Filix fragilis (i,.) Underw. (Polypodium fragilis 1,., Cysiopleris fragilts Bernh.), Colo- 
rado, Delaware, Illinois, Indiana, Massachusetts, Montana, New York, Utah, Wash- 
ington, Wisconsin, Wyoming. 
Woodsia glabella R. Br., Michigan. 
TYPE LOCALITY: Europe, on Polypodium fragilis. 
DISTRIBUTION : Delaware to Illinois, Colorado, and northward ; also in Europe. 
ILLUSTRATION: Beitr. Krypt. Schweiz 2?: f 309 
ExXsICccaTlI: Ellis & Ev. N. Am. Fungi 2497 ; Ellis & Ev. Fungi Columb. 559, 765; Sydow, 
Ured. 1948. 
3. Hyalopsora laeviuscula (Dietel & Holway) Arthur. 
Uredo laeviuscula Dietel & Holway, Erythea 2: 127. 1894. 
Thecopsora Jaeviuscula Dietel, Ann. Myc. 1: 416. 1903. 
I. Aecia unknown. 
II. Uredinia hypophyllous, scattered, roundish, 0.3-0.5 mm. across, bullate, tardily de- 
hiscent by rupture; peridium delicate; urediniospores very irregular, oblong, obovate, 
even linear, 15-22 by 25-40; wall colorless, thin, 1-1.54, minutely verrucose, appearing 
smooth when wet, pores obscure. 
III. Teliospores more or less crowded in the epidermal cells, 4-celled, globoid, 15-20 « 
broad ; wall colorless, smooth, thin, 1-1.5z. 
ON POLYPODIACEAE : 
Polypodium californicum Kaulf., California. 
Polypodium Glycyrrhiza D.C. Eaton (P. falcatum Kell.), Washington. 
TYPE LOCALITY: Mt. Tamalpais, California, on Polypodium cahfornicum. 
DISTRIBUTION: Central California and northward along the coast. 
4, Hyalopsora Cheilanthis (Peck) Arthur. 
Caeoma Cheilanthis Peck, Bull. Torrey Club 10: 62. 1883. 
Uredo Pellaeae Dietel & Neger, Bot. Jahrb. 27: 15. 1899. 
Uredo Pasadenae Sydow, Ann. Myc. 2: 31. 1904. 
Hyalopsora peliaeicola Arth. Bull. Torrey Club 33: 30. 1906. 
I. Aecia unknown. 
II. .Uredinia amphigenous, scattered, irregularly round or oblong, bullate, 0.3-0.7 mm. 
across, dehiscent by apical rupture, soon naked, pulverulent, golden-yellow, ruptured epi- 
dermis noticeable; peridium very delicate and difficult to detect, walls thin ; urediniospores 
globoid or obovate-globoid, 16-22 by 20-30; wall colorless, thin, 1, often seemingly 
much thicker, minutely verrucose, or even echinulate-verrucose, pores obscure, equatorial. 
III. Telia unknown. 
ON POLYPODIACESE ; : . ; 
Ceropteris triangularis (Kaulf.) Underw. (Gymnogramme triangularis Kaulf.), Cali- 
fornia. 
Cheilanthes Pringlei Dav., Arizona. 7 a 
Cryplogramme Sielleri (Gmel.) Prantl (Pellaea gracilis Hook.), Iowa, Michigan. 
Fellaea andromedaefolia (Kaulf.) Fée, California. 
TYPE LOCALITY: Southeastern Arizona, on Cheilanthes Pringle. 
DISTRIBUTION : Lake Superior to California; also in South America. 
8. CALYPTOSPORA Kuhn, Hedwigia 8: 81. 1869. 
Cycle of development includes pycnia, aecia and telia, with distinct alternating phases ; 
heteroecious. Pycnia subcuticular, aecia arising within the mesophyl, telia in the epi- 
dermal cells. 
Pycnia rarely seen, but probably much flattened, low, without ostiolar filaments. 
Aecia erumpent, cylindrical, dehiscent at apex. Peridium colorless, with thin-walled 
cells. Aeciospores ellipsoid ; wall colorless, thin, verrucose without smooth spot. 
