170 NORTH AMERICAN FI.ORA [Volume 7 



9. Phragmidium Rosae-californicae Dietel, Hedwigia 44 : 125. 1905. 



0, Pycnia not seen, rarely formed. 



1. Aecia hypophyllous, round or oblong, 0.5-2 mm. across, solitary or in annular or 

 irregular groups, on petioles and young shoots causing considerable hypertrophy and dis- 

 tortion, often confluent over areas 10-15 mm. long, applanate, bright orange-yellow fading 

 to pale-yellow, ruptured epidermis usually noticeable ; paraphyses numerous, surrounding 

 each individual sorus, somewhat incurved, scarcely as tall as the spore-mass, narrowly cla- 

 vate, or slightly capitate, 13-16 by 50-65 fi, the wall evenly thin, usually less than 1 /i, nearly 

 or quite colorless, smooth; aeciospores globoid or globose-ellipsoid, 13-20 by 18-27// ; wall 

 nearly colorless, rather thick, 2-3 /i, finely and distinctly verrucose with well -separated 

 papillae, the pores large, distinct, about 8. 



II. Uredinia hypophyllous, numerous, thickly scattered, round, small, 0.1-0.2 mm. 

 across, early naked, ruptured epidermis inconspicuous ; paraphyses encircling the sorus, 

 abundant and conspicuous, strongly incurved, usually somewhat clavate, 7-12 by 39-61 //, 

 the wall thin, 1 //, slightly thicker above toward the apex, nearly or quite colorless, smooth ; 

 uredinio spores obovate or broadly ellipsoid, 16-19 by 19-25 ," ; wall pale-yellow, rather 

 thick, 2-2.5 /i, closely verrucose-echinulate, the pores indistinct, scattered, 6 or more. 



III. Telia hypophyllous, at first arising from the uredinia, 0.2-0.5 mm. across, usually 

 few spores in each sorus, ruptured epidermis inconspicuous ; paraphyses none ; teliospores 

 cylindrical, 26-30 by 90-112 ,m, rounded or narrowed below, attenuate above toward the apical 

 papilla, 8-11-celled; wall blackish-brown, about 5/i thick, closely and moderately verru- 

 cose, the apex usually with a conical subhyaline papilla somewhat roughened about the 

 base, 7-12 /-i long ; pedicel rugose when dry, the upper half colorless except near spore, 

 8-10// in diameter, the lower part colorless, swelling in water to lanceolate, 25-35 fi at the 

 broadest diameter. 



On Rosaceae : 



J?osa californica Cham. & Schlecht. {R. spithamea A. Gray), California, Oregon. 



Rosa gymnocarpa Nutt., California, Oregon, Washington. 



Rosa gvfnnocarpa pubescens S. Wats,, California. 



Rosa niimitifolia ^Engelm., California. 



Rosa nuikana Presl, Washington ; British Columbia. 



Rosa pisocarpa A. Gray, Washington ; British Columbia. 



Rosa sonotnensis Greene, California. 

 Type locality; Sisson, California, on Rosa californica. 



Distribution : Along the Pacific slope from southern California to British Columbia. 

 ExsiccATi : Sydow, Ured. 1390, 1836; Ellis & Ev. Fungi Columb. 1751; Barth. Fungi Columb. 

 3051,3157,3158. 



Illustrations : Torreya 9 : 22,/. 3 ; Hedwigia 44 : pi, 4,f. 7. 



10. Phragmidium Rosae-arkansanae Dietel, Hedwigia 44 : 333. 1905. 



0. Pycnia chiefly epiphyllous, usually few, in small groups opposite the aecia, often 

 confluent, inconspicuous, subcuticular, extending into the walls of the epidermal cells, 

 pale honey-yellow, discoidal, low, 80-145 fi in diameter by 25-35^ high. 



1. Aecia chiefly epiphyllous and petiolicolous, 0.3-0.8 mm. across, solitary or in annu- 

 lar or irregular groups, sometimes confluent on the petioles forming sori 1-2 mm. or more 

 long, applanate, bright orange-yellow fading to pale-yellow, ruptured epidermis usually 

 noticeable ; paraphyses rather few, inconspicuous, surrounding each individual sorus, erect, 

 clavate, 10-13 by 50-65 /^, the wall evenly thin, 1 /i, nearly or quite colorless, smooth ; aecio- 

 spores broadl}"- ellipsoid or globoid, 19-23 by 23-29 /i; wall nearly colorless, rather thin, 

 1.5-2 fi, finely but sparsely and distinctly verrucose, the pores evident, scattered, about 8. 



II. Uredinia hypophyllous, numerous, thickly scattered, round, small, 0.1 mm. or less 

 across, early naked, ruptured epidermis inconspicuous; paraphyses encircling the sorus, 

 abundant and conspicuous, strongly incurved, mostly cylindrical, 7-12 by 40-60^, the wall 

 evenly thin, 1 f^or less, nearly or quite colorless, smooth ; urediniospores obovate-globoJd, 

 15-19 by 18-23 /i ; wall pale-yellow, moderately thick, 1.5 /i, rather closely verrucose-echinu- 

 late, the pores indistinct, small, scattered, about 8. 



III. Telia hypophyllous, at first arising from the uredinia, very numerous, scattered, 

 usually crowded, rather large, 0.1-0,2 mm. across, very many spores in each sorus, rup- 



