Uredinacese, Puccinia. 709 



cellnlis rhomboideis 21-29 [x. long., tunicis transverse striatis, ex- 

 terna 9-12 ji. cr., interna 5-7 ^. cr., verruculosa; ascidiosporis glo- 

 boideis 17-24 ^:» 15-20, tunica hyalina, 1-1,5 a. cr., minute plano- 

 verruculosa ; uredosoris amphigenis sparsis oblongo-linearibus, 0,2- 

 0,8 mm. long., dein nudis, subpulverulentis, cinnamomeis; uredo- 

 sporis ellipsoideis, 23-29 « 19-25, tunica cinnamomea, minute echi- 

 nulata, 2-2,5 [x. cr. ; poris 6 sparsis; teleutosoris amphigenis spar- 

 sis, lineari-oblongis, 0,4-1 mm. long., diu tectis, atro-brunneis ; 

 teleutosporis clavato-oblongis 31-61 « 13-19, apice obtusis, deorsum 

 tenuatis^ septo non vel vix constrictis, tunica castanea, 1-1,5 jx. 

 cr., apice ad 3-5 [x. incrassata, pedicello subcolorato, brevissimo. 



Hab. st. pycn. et secid. in foliis Thalictri Fendleri, T. 

 occidentalis, T. sparsiflori, T. venulosi; st. uredo- 

 teleut. in foliis Bromi Porteri, B. Pumpelliani, B. Ri- 

 chardsoni in Amer. bor. pluribus locis. 



312. Puccinia Dietrichiana Tranzsch., Ann. Mycol. V (1907) p. 4l8. 2700 

 Stat. aicid. : JEcidium Trollii Blytt — Syll. YII, p. 670 (perpe- 

 ram ut st. ;ecid. PuccinicB Trollii) --■ St. teleut. morphologice ut 



in Puccinia persistenti Plowr. — Syll. IX, p. 312. 



Hab. in foliis Tritici (Agropyri) canini, in Rossia. 



313. Puccinia obliterata Arthur, Mycologia I (1909) p. 25. — Py- 2701 

 cnidiis paucis, epiphyllis melleis 80-107 v 40-75; gecidiis pro more 

 hypophyllis, aggregatis in maculis latis decoloratis; pseudoperidiis 

 hyalinis, margine erosis, brevibus; cellulis rhombeis 16-24 [j.. long. ; 

 secidiosporis globoideis v. subangulosis, 18-25 « 15-19, membrana 

 tenui, hyalina, 1 [j.. cr., tenuissime verruculosa; uredosoris saepius 

 hypophyilis, sparsis, lineatis, mox nudis, pulverulentis, cinnamo- 

 meis; uredosporis globoideis v. late ellipsoideis, 19-29 ^ 16-23, tu- 

 nica cinnamomea, l|5-2,5 [i. cr., minute echinulato-verrucosa, poris 



6-8 sparsis; teleutosoris ssepius epiphyllis, sparsis vel aggregatis, 

 oblongis V. lineatis 0,5-2 mm. long., 0,1-0,3 mm. lat., serius nu- 

 datis, nigricantibus ; teloutosporis clavatis v. clavato-oblongis 29- 

 51 "^ 13-19, apice subrotundis, deorsum tenuatis, vix v. non con- 

 strictis, tunica atro-castanea, tenui, 1-1,5 [i. cr., apice usque ad 3-5 

 {j.. incrassata, levi; pedicello colorato brevi. 



Hab. st. pycn. et secid. in foliis Aquilegi^c caeruleio, A. 

 elegantulfe, A. flavescentis, A. formos.e, A. truncatse 

 in Americiie bor. pluribus locis; st. uredo-teleutosporicus in foliis 

 Agropyri biflori et A. canini, Laggan Alb. Araer. bor. 

 (Holway). 



