176 NORTH AME)RICAN FLORA [V01.UMK 7 



0. Pycnia chiefly epiphyllous and caulicolous, crowded in considerable groups, often 

 confluent, inconspicuous, subcuticular, extending well into the lateral walls of the epider- 

 mal cells, pale honey-yellow, flattened-conoidal or discoidal, 65-160 /^ in diameter by 35-50 ," 

 high. 



1. Aecia hypophyllous and caulicolous, usually on swollen and distorted areas of more 

 or less extent, roundish, 0.5-1 mm. across, on leaves forming small groups, on petioles, 

 stems and fruit confluent into irregular groups 10 mm. or more long, applanate, bright 

 orange-yellow fading to pale-yellow, ruptured epidermis usually conspicuous ; paraphyses 

 at first often rudimentary or wanting, in senile sori peripheral, usually few, erect, finally 

 somewhat exceeding the height of the spore-mass, slender, clavate or cylindrical, 9-13 by 42- 

 50^, the wall almost evenly thin, 1// or less, colorless; aeciospores oblong- elliptical, obo- 

 vate, rarely oblong- clavate, 16-24 by 24-35 pi ; wall pale-yellow, rather thin, \-2 fi, distinctly 

 echinulate-verrucose with pointed beads standing 1 fj. apart, the pores indistinct, scat- 

 tered . 



III. Telia caulicolous, gregarious, crowded, oblong, ab 'Ut 1 mm. long, usually more or 

 less confluent and 10-30 mm. long causing a somewhat fusiform hypertrophy, at first crust- 

 like, with age becoming felty, grayish-black ; teliospores cylindrical, 21-27 by 58-102 /z, 

 rounded at both ends, except a semi-hyaline apiculus above 3-7 (U long and nearly as broad, 

 4-8-celled ; walls smoky-brown, 3-5 fi thick, smooth, the pores 2 or sometimes 3 in each cell ; 

 pedicel three to five times length of spore, slightly tinted especially near the spore, 7-9 m 

 in diameter, usually tapering in lower part, nearly or quite solid due to thickened walls, 

 somewhat rugose near base. 



On Rosaceae : 



Rosa blanda Ait., Iowa, New York, Wisconsin ; Nova Scotia. 



Rosa caroliiia L. {R. corymbosa Ehrh.), Indiana, Massachusetts, North Carolina. 



Rosa Fendleri Crepin, Colorado. 



Rosa foliosa Nutt., Texas. 



Rosa humilis Marsh., Alabama, Indiana, Kentucky, Mississippi, Missouri, New York, 



Vermont. 

 Rosa Macounii Greene, Colorado. 

 Rosa Maximiliani Nees {R. Woodsii S. Wats, not Ivindl.), Kansas, Nebraska, South 



Dakota. 

 Rosa pecosensis Cockerell, New Mexico. 

 Rosa pisocarpa A. Gray, Washington. 

 Rosa heliophila Greene {R. arkansana S. Wats, not Porter, R. praiincola Greene), Iowa, 



Kansas, Minnesota, Nebraska, North Dakota, South Dakota. 

 Rosa rugosa Thunb., South Dakota, Wisconsin. 

 Rosa Sayi Schw., Colorado. 



Rosa virginiana Mill. {R. ludda Ehrh.), Connecticut, New Jersey; Nova Scotia. 

 Rosa sp. cult., Connecticut, Iowa, New Jersey, Wisconsin. 

 Type locality: North America [North Carolina], on Rosa corymbosa. 



Distribution : Throughout the United States and southern Canada, most abundant in the 

 prairie regions of the Mississippi valley. 



ExsiccATi : Ellis, N. Am. Fungi 281 ; Ellis & Ev. Fungi Columb. 494 ; Earth. Fungi Columb. 

 2248, 2544, 2647 ; Brenckle, Fungi Dak. 53, 53a; Rav. Fungi Car. 3: 90 ; Thiim. Myc. Univ. 

 247; Kellerm. & Swingle, Kan. Fungi 7^/ Sevm. & Earle, Econ. Fungi 3*7/ Sydow, Ured. 729/, 

 22S5 ; D. Griff. W. Am. Fungi 12, 12a, 12b ; Rab.-Wint. Fungi Eur. 3707a, b, 3610. 



2. Earlea alaskana Arthur, sp. nov. 



0. Pycnia unknown. 



1. Aecia amphigenous, indefinite, irregular, elongate on the veins and stems, bullate, 

 0.3-0.5 by 0.5-1.5 mm., often confluent into irregular groups, gradually becoming naked, 

 pulverulent, pale-yellow upon drying, ruptured epidermis conspicuous; paraphyses periph- 

 eral, rather numerous, somewhat incurved, not much exceeding the height of the spore- 

 mass, cylindrical or clavate, 10-13 by 50-65 /i, the wall thin, 1-1. 5/^, thicker above, 4-6 /i, 

 colorless, smooth; aeciospores ellipsoid, 15-20 by 20-28^; wall nearly colorless, thin, 

 1-1.5/", thickly and coarsely verrucose with low and slightly irregular beads, the pores 



indistinct, scattered. 



III. Telia not available for study, seemingly hypophyllous ; teliospores too few to supply 

 full characters, cylindrical, 26-31 by 79-108 fi, rounded at both ends, except a prominent, 

 conical apiculus 5-10 /^ long, 6-8- (usually 7-) celled, slightly or not constricted at the septa ; 

 wall blackish or chocolate- brown, 2.5-3.5 /^ thick, unevenly and rather finely verrucose, 



