22 Jouryial of Mycology [Vol. 14 



inner wall medium thick, 3-4 /^, verrucose, outer wall thicker, 5-9 m, 

 smooth, striate; aeciospores globoid, small, 12-18 by 15-21 m; wall very 

 thin, 0.5-1/", nearly colorless, very minutely granular. 



On Artemisia dracunculoides Pursh, Colorado, Nebraska; A. Cana- 

 densis Michx., Iowa, Nebraska; A. frigidia Willd., Montana; A. kansana 

 Britt., Nebraska. Type on A. Draciinculus L., Western Siberia. 



II. Uredinia epiphyllous, scattered, oblong, 0.2-0.5 mm. long, rather 

 early naked, cinnamon-brown, ruptured epidermis conspicuous ; uredinio- 

 spores broadly ellipsoid, 15-19 by 20-26 m, wall cinnamon brown, 1-1.5 M 

 thick, rather finely echinulate, pores 2, equatorial. 



III. Telia epiphyllous, scattered, roundish or oblong, 0.1-0..3 mm. 

 wide by 0.2-1.2 mm. long, early naked, pulvinate, ruptured epidermis 

 noticeable; teliospores clavate-oblong, 16-26 by 35-52 m, wall dark chest- 

 nut-brown, lighter and about 1.5-2 m thick below, thicker above, 7-12 M, 

 smooth ; pedicel tinted, one-half length of spore, or more. 



On Carcx stenophytla V.'ahl., Colorado, Nebraska, Montana. 



5. PucciNiA on Carex longirostris. — Field observations 

 by Dr. E. W. Olive, and material furnished by him, including 

 aecia host plants, supplied the entire basis for the result reported 

 under this number. 



Teliospores from Carex longirostris Torr. were sown June 

 4 on Aster paniculatns, Erigeron aniuins, Solidago Canadensis, 

 Ribes Cynosbati, and Phryma leptostachya, with no infection, 

 except on Phryma, which showed pycnia June 10 in great 

 abundance, and aecia June 15. The development was excep- 

 tionally strong and characteristic. 



No rust has heretofore been reported on this species of 

 Carex. The aecial stage was first collected at Spirit Lake. Iowa, 

 by Dr. B. D. Halsted, in 1886. and has since been reported from 

 Minnesota and Nebraska, and found by Dr. Olive this season 

 at Madison, Wis. A description of the species in its several 

 spore-stages is appended : 



Puccinia Phrymae (Halst.) nom. no v. (Aecidium Phry- 

 mae Halst., Jour. Myc. 2:52. 1886.) 



0. Pycnia amphigenous, few, crowded in small groups, inconspicu- 

 ous, honey-yellow, becoming blackish-brown, slightly flattened globoid, 

 77-110 M in diameter by 65-80 m high; ostiolar filaments 40-50 ytt long. 



1. Aecia hypophyllous, gregarious, in lari^e open groups on dis- 

 colored spots 4-10 mm. across, very short, 0.2-0.3 mm. in diamete*-, pale 

 yellow : peridia colorless, margin recurved, crose, peridial cells -homboidal 

 in longitudinal section, overlapping, inner wall thin, about 1 /li, finely 

 verrucose, outer wall thicker, 3-4 1". striate, smooth ; aeciospores globoid, 

 12-16 by 14-19 m, wall pale yellow, thin, 1 m or less, finely verrucose. 



On Phryma leptostachya L., Iowa, Wisconsin, Nebraska, Minne- 

 sota. Type from Spirit Lake, Iowa. 



II. Uredinia hypophyllous, scattered, round or oblong, early naked, 

 ruptured epidermis noticeable; urediniospores broadly ellipsoid, 15-18 by 

 18-20 M, wall cinnamon-brown, 1-1.5 M thick, finely and rather sparsely 

 echinulate, pores 2, in upper part. 



