166 NORTH AMERICAN FI.ORA [VoivUMK 7 



Rubus strigosus Michx. {R. idaeus canadensis Richardson), Colorado, Illinois, Iowa, 

 Maine, Massachusetts, Minnesota, Montana, Oregon, South Dakota, Washington ; 

 British Columbia, New Brunswick, Newfoundland, Nova Scotia, Ontario. 



Type locality : Decorah, Iowa, on Rubus strigosus. 



Distribution : Massachusetts to Colorado and northern California, and northward into Canada. 



KxsiccATTi: Kllis, N. Am. Fungi 282 in part, 1480; Ellis & Ev. Fungi Columb. 870, 1386; 



Barth. Fungi Columb. 2748; D. Grifp. W. Am. Fungi 251; Sydow, Ured. 7i^(5;Seym. &Earle, Econ. 

 Fungi 33. 



3. Phragmidium Rubi-odorati Dietel, Hedwigia 44 : 120. 1905. 



0. Pyci;iia not seen. 



1. Aecia amphigenous, irregular in outline, more or less confluent, 0.2-1 mm. across, 

 on pale-yellowish spots 1-2 mm. across, soon naked, orange-yellow fading to pale-yellow, 

 pulverulent, ruptured epidermis scarcely noticeable ; paraphyses rather conspicuous, sur- 

 rounding each individual sorus, numerous, exserted and slightly incurved, with many 

 shorter ones outside beneath the epidermis forming a kind of colorless stroma, terete, 9-13 

 by 65-100 jti, the wall thin, 1 //, much thicker at apex, 3-5 /ti ; aeciospores globoid or broadly 

 ellipsoid, 15-19 by 18-24/^; wall nearly colorless, moderately thick, 2-2.5 jW, coarsely verru- 

 cose with large irregular warts. 



II. Uredinia hypophyllous, small, scattered, round, 0.1-0.3 mm. across, early naked, 

 ruptured epidermis inconspicuous ; paraphyses surrounding the sorus, abundant and con- 

 spicuous, incurved, clavate, 9-12 by 51-80/^, the wall thin, about 1//, thicker on upper side 

 of curve toward the apex, 2-4 /«, nearly or quite colorless, smooth ; urediniospores ellipsoid 

 or subglobose, 15-18 by 18-23 // ; wall pale-yellow, thin, about 1 /i, strongly and rather 

 sparsely verrucose-echinulate, the pores indistinct, scattered. 



III. Telia hypophyllous, at first arising from the uredinia, scattered, small, roundish, 

 0.2-0.7 mm. across; paraph3'ses none; teliospores cylindrical, 29-34 by 80-110/", rounded 

 above and below, 7-10-celled ; wall very dark chocolate-brown, 5-7 ii thick, closely and 

 moderately verrucose, with a long conical hyaline apiculus above, 7-17 ^ ; pedicel about 

 length of the spore, rugose when dry, the upper half colorless except near the spore, the 

 lower part colorless swelling in water to lanceolate, 16-22 ^ at broadest diameter. 



On Rosaceae : 



Rubacer odoratum (L. ) Small {Rubus odoratus Iv.), Connecticut, Maine, New York, North 

 Carolina, Vermont, West Virginia; Ontario. 

 Type LOCALITY : North America, on Rubus odoratus. 



Distribution : Western North Carolina and eastern Ontario eastward, nearly throughout the 

 range of the host. 



4. Phragmidium occidentale Arth.; Earle, in Greene, PI. 



Baker. 2:3. 1901. 



0. Pycnia epiphyllous, few in small groups on discolored spots 1-1.5 mm. across, 

 inconspicuous, subcuticular, pale honey-yellow, low, discoidal, 144-160^ broad by 42-48 /i 



high. 



1. Aecia hypophyllous, small, usually confluent, forming rather compact compound sori 



of roundish outline 0.4-1 mm. across, pulvinate, bright orange-yellow fading to pale-yellow, 

 ruptured epidermis not noticeable ; paraphyses not very numerous nor conspicuous, sur- 

 rounding each individual sorus, incurved, slightly or not at all exceeding the height of the 

 spore-mass, mostly clavate, 10-19 by 64-80^, the wall rather thin, 1-1,5//, uniform, nearly 

 or quite colorless, smooth ; aeciospores broadly ellipsoid, 16-20 by 20-29 {J. ; wall pale-yellow, 

 moderately thick, 1.5-2.5 //, moderately verrucose with low rounded papillae. 



II. Uredinia hypophyllous, small, scattered, roundish, 0.2-0.4 mm. across, early naked, 

 ruptured epidermis inconspicuous ; paraphyses surrounding the sorus, abundant and con- 

 spicuous, incurved, clavate, 10-16 by 48-75//, the wall thin, 1-1.5//, considerably thickened 

 at the apex, 4-8 //, nearly or quite colorless, smooth ; urediniospores broadly ellipsoid, 15-19 

 by 19-25 //; wall pale-yellow, moderately thin, 1.5-2//, moderately echinulate-verrucose, 

 the pores indistinct, scattered, about 6. 



III. Telia hypophyllous, at first arising from the uredinia, scattered, small, 0.3-0.7 

 mm. across; paraphyses none ; teliospores cylindrical, 26-29 by 65-110//, rounded above and 



