Parr 2, 1907] ‘ UREDINACEAE 109 
Arctostaphylos Manzanita Parry, California. 
Arctostaphylos nevadensis A. Gray, California. 
Arclosiaphylos patula Greene, California. , 
Mairania alpina (1,.) Desv. (Arctostaphylos alpina Spreng.), British Columbia, Quebec. 
TYPE LOCALITY : St. Gall, Switzerland, at 2000 m., on Arctostaphylos alpina, 
DISTRIBUTION: Canada from the Atlantic to the Pacifie coast, southward in the mountains 
through California to southern Mexico; also in Europe. 
ILLUSTRATION : Ed. Fisch. loc. cit. f. 306. 
EXsICCaTI: Rab.-Wint.-Paz, Fungi Eur. 4042; Sydow, Ured. 1796, 1797, 
8. Pucciniastrum minimum (Schw.) Arth. Résult. Sci. Congr. Bot. 
Vienne 337. 1906. 
Uredo minima Schw. Schr. Nat. Ges. Leipzig 1: 70. 1822. 
Caeoma (Uredo) Azaleae Schw. Trans. Aw. Phil. Soc. II. 4: 291. 1832. 
O and I. Pycnia and aecia unknown. 
If. Uredinia hypophyllous, minute, less than 0.3 mm. across, scattered or clustered on 
indefinite discolored spots, mammillose, pale-yellow, dehiscent by central pore, finally 
pulveruient, long covered by the overarching epidermis ; peridium hemispherical, delicate, 
cells small, cuboidal, walls thin, 24, ostiolar cells much larger, 14-16 high, wall thick- 
ened below, smooth; urediniospores ellipsoid, or obovate-oblong, 12-17 by 20-24; wall 
colorless, thin, 1-1.54, finely echinulate with sharp points. 
III. Telia unknown. 
ON ERICACEAE : 
Azalea nudifora \,. (Rhododendron nuditorum T. & G.), Alabama, New York, North 
Carolina, Pennsylvania, South Carolina. 
Azalea viscosa \,. (Rhododendron viscosum Torr.), Alabama, Massachusetts, New Jersey. 
Menziesia pilosa (Michx.) Pers., West Virginia. 
Rhodora canadensis l,., New Hampshire. 
TYPE LOCALITY: North Carolina, on Azalea nudifiora. 
DISTRIBUTION : New York southward to South Carolina and Alabama. 
ExsiccaTr: Ellis, N. Am. Fungi 1081; Rav. Fungi Am. 486. 
9. Pucciniastrum Myrtilli (Schum.) Arth. Résult. Sci. Congr. Bot. 
Vienne 337. 1906. 
Aecidium ? Myrtill Schum. Enum. Pl. Saell. 2: 227. 1803. 
Uredo pustulata yy Vaccintit Alb. & Schw. Consp. Fung. 126. 1805. 
Uredo Vacciniorum DC. Fl. Fr. 6: 85. 1815. 
Caeoma Vacciniorum Link, in Willd. Sp. Pl. 62: 15, 1825. 
Thecopsora ? Vacciniorum Karst. Bidr. Finl. Nat. Folk 31: 58. 1879. 
Thecopsora myrtillina Karst. Bidr. Finl. Nat. Folk 31: 59. 1879. 
Melampsora Vaccinit Wint. in Rab. Krypt. Fl. 1': 224. 1881. 
Mclampsora Vacciniorum Schrét. Krypt. Fl. Schles. 3t: 365. 1887. 
Pucciniastrum Vacciniorum Dietel, in E. & P. Nat. Pfl. 11**: 47, 1897, 
O and I. Pycnia and aecia unknown. 
II. Uredinia hypophyllous, scattered or somewhat gregarious, small, 0.1-0.2 mm. 
across, bullate, round, dehiscent bysmall central pore, yellowish-red fading to pale-yellow, 
long covered by overarching epidermis; peridium hemispherical, firm, cells very small, 
cuboidal, wall uniformly thin, 1, ostiolar cells large, ovoid, 25-354 high, walls smooth, 
uniformly thick, often nearly obliterating the lumen; urediniospores broadly obovate or 
ellipsoid, 13-19 by 16-24”; wall colorless, thin, 1-2“, minutely echinulate; contents orange- 
yellow when fresh. 
III. Telia hypophyllous, minute, light-brown, indehiscent; teliospores within the 
epidermal cells, oblong or columnar, 7-10 by 14-17 #; wall smooth, uniformly thin, 1, 
nearly colorless. 
ON VACCINIACEAE : 
Gaylussacia resinosa (Ait.) T, & G., Massachusetts, New York. 
Vaccinium cacspitosum cuneifolium Nutt., Washington. 
Vaccinium canadense Rich., Wisconsin. 
Vaccinium corymbosum me oe 
Vaccinium globulare R ., Idaho. : ; 
Vaccinium Sani ae Dougl. (V. myrtilloides Hook.), Idaho, Washington. 
Vaccinium Myrsinites Lam., Florida. 
Vaccinium oreophilum Rydb., Colorado. | 
Vaccinium uliginosum l,., New Hampshire. = : 
TYypr LOCALITY: Island of Zealand, Denmark, on Vaccinium Myrtillus. 
