Part 3, 1912J ABCIDIACEAE 177 



the pores generally 3 in each cell ; pedicel once to once and a half length of spore, somewhat 

 tinted in upper part, nearly or quite solid, of uniform diameter, 7-9^, not swelling below. 



On Rosaceae : 



Rubus siellaius Smith, Alaska. 

 Type collected at Disenchantment Bay, Alaska, June 19, 1899, William Trelease 670. 



3. Earlea Horkeliae (Garrett) Arthur. 



Phragmidium Horkeliae Garrett, Fungi Utah. 112. 1907. 



O and I. Pycnia and aecia unknown. 



III. Telia amphigenous, numerous, scattered, sometimes confluent, roundish or oval, 

 0.5-2 mm. across, on discolored spots occupying part or all of a leaflet, rather tardily 

 naked, pulvinate, blackish-brown, ruptured epidermis very conspicuous ; teliospores ellip- 

 soid, 23-27 by 37-58 /£, usually rounded below, rounded or often narrowed above, slightly 

 or not constricted at the septa, mostly 2- (rarely 1- or 3-) celled ; wall light chocolate-brown, 

 about 1.5-2.5 /i thick, slightly thicker above, 3-5 /i, inconspicuously and sparsely verrucose, 

 often appearing smooth, the pores 2 in each cell ; pedicel nearly or quite colorless, two to 

 three times length of spore or more, 3-5 ," in diameter, uniform, or tapering downward, 

 somewhat rugose at base. 



On Rosaceae : 



Ivesia Gordonii (Hook.) T. & G. {Horkelia Gordonii Hook.), Utah. 

 Type locality : Big Cottonwood Canyon, Salt Lake County, Utah, on Horkelia Gordonii. 

 Distribution : Known only from Salt I^ake County, Utah. 

 BxsiccATi : Garrett, Fungi Utah. 112. 



4. Earlea bilocularis (Dietel & Holway) Arthur. 



Phragmidium biloculare Dietel & Holway ; Dietel, Bot. Gaz. 19 : 305. 1894. 

 Gymnoconia bilocularis Arth. Result. Sci. Congr. Bot. Vienne 342. 1906. 



0. Pycnia not seen. 



1. Aecia hypophyllous and caulicolous, somewhat grouped or scattered, on indefinite 

 discolored spots, roundish, 0.5-1 mm. across, soon naked, orange-yellow fading to pale- 

 yellow, somewhat pulverulent, ruptured epidermis rather conspicuous ; aeciospores globoid 



or elliptical-globoid, 18-21 by 20-30 /i; wall colorless, rather thin, 1.5-2//, verrucose with 



small, distinct beads. 



III. Telia hypophyllous and caulicolous, at first arising beside the aecia, afterward 

 independent, scattered irregularly, at first covered by the membranous epidermis, soon 

 naked, roundish or oblong, 0.5 mm. across, somewhat pulverulent, dull chestnut-brown, 

 ruptured epidermis noticeable ; teliospores ellipsoid, 19-26 by 30^0 /£, rounded at both 

 ends, not constricted at septa, mostly 2- (rarely 3-) celled ; wall cinnamon -brown, uniformly 

 thick, 3-4 /i, closely verrucose with rather large, colorless tubercles, swelling somewhat in 

 water, the pores obscure, usually 3 in each cell; pedicel nearly colorless, firm, tapering 

 downward, rather short, about length of spore. 



On Rosaceae : 



Potentilla flabellifolia Hook. {P. gelida S. Wats.), Washmgton. 

 Type locality : Chiquash Mountains, Skamania County, Washington, on Poieniilla gelida. 

 Distribution : Known only from the state of Washington. 



18. TRACHYSPORA Fuckel, Bot. Zeit. 19 : 250. 1861. 



Cycle of development imperfectly known ; only uredinia and telia recognized, both 

 subepidermal, but judging from analogy also possessing subcuticular pycnia. 



Uredinia erumpent, somewhat indefinite, without peridium or paraphyses. Uredinio- 

 spores borne singly on pedicels, globoid ; wall thin, pale or colorless, verrucose, the pores 



obscure. 



Telia erumpent, often first arising from the uredinia, usually definite, without paraph- 

 yses. Teliospores free, one-celled, more or less coarsely verrucose; wall somewhat 

 laminate, colored, hygroscopic layer and pores obscure ; pedicels hyaline, not hygroscopic. 



Type species, Uredo Alchemillae Pers. (on Akhemilla vulgaris). 



