UredinacefE, Puccinia. 697 



saepe coniluentibus, epidermide tectis, nigrescentibus ; stromate ple- 

 rumque nullo; teleutosporis oblongis, 25-39 » 12-16. septo non v. 

 leniter constrinctis, utrinque obtusatis, tunica castaneo-brunnea, 

 levi, tenui, 1-1,5 [x., apice incrassata usque ad 5-10 |x., concolori; 

 pedicello brevissimo, colorato. 



Hab. in foliis culmisque Agrostidis hiemalis et A. pe- 

 rennantis, Amer. bor. — A Pucc. Agrostidis Plowr. diversa. 



274. Puccinia praegracilis Arth., Bull. Torr. Bot. Club XXXIV fieo?) 2662 

 p. 585. — Uredosoris amphigenis, sparsis, oblongis, ilavis, 0,1- 



0,2 mm. lat., 0,2-0,3 mm. long., mox nudis, pailide ilavis, pulve- 

 rulentis; uredosporis late ovoideis, 16-19^18-21, tunica crassiu- 

 scula, 1 [j.., pallide flava, minute et crebre echinulata, poris circ. 

 6 sparsis, inconspicuis; teleutosoris, oblongis v. linearibus 0,1-0,8 

 mm. lat., 0,3-1 mm. long., irregulariter coniluentibus, epidermide 

 tectis, purpureo-nigris ; stromate nullo; teleutosporis oblongis vel 

 lineari-oblongis 30-40^12-13, ad septum non v. leniter constri- 

 ctis. utrinque obtusis v. truncatis, apice appendicibus tuberculifor- 

 mibus coronatis, tunica brunneo-aurata, levi, tenui, 1 u-., supra 

 crassiore usque ad 2-4 «i., appendicibus exclusis, obscuriore; pe- 

 dicello lato, brevissimo, concolori. 



Hab. in foliis Agrostidis Thurberianse, Glacier, Colum- 

 bia britannica. — A Pucc. coronata probe diversa. 



275. Puccinia Cynosuroidis (P. Henn.j Syd., Ann. Mycol. V (1907) iOGS 

 p. 494, Uromyces Cynosuroidis P. Henn. — Sacc. XVII. p. 261. 



— Uredosoris amphigenis, maculis obsoletis fuscidulis insidentibus, 

 sparsis vel seriatim dispositis, oblongis, ca. '/,-1 mm. longis. cin- 

 namomeis; uredosporis subglobosis, ovatis vel piriformibus, apice 

 rotundatis incrassatis (usque ad 7 [j.j obscurioribusque, aculeatis, 

 castaneo-brunneis, 28-42*18-26, episporio ca. 2 'j.. crasso; para- 

 physibus numerosis, iiavidis, apice capitato-incrassatis ; teleutosoris 

 conformibus sed obscurioribus; teleutosporis ellipsoideis, utrinque 

 rotundatis, apice non vel paullo incrassatis, medio vix constrictis, 

 levibus, castaneo-brunneis, 25-35 « 18-24, episporio ca. 2 [j,. crasso; 

 pedicello ilavido, crassiusculo, persistenti, ca. 35 [j.. longo, subinde 

 oblique inserto. 



Hab.xn foliis Eragrostidis cynosuroidis, pr. Port Said 

 jEgypti et in Amer. bor. — Cl. Hennings habuit uredosporas ca- 

 staneo-brunneas pro teleutosporis. 



276. Puccinia cacao Mac AIp., Rusts of Australia (1906) pag. 117, 26Gi 

 tab. XXX, iig. 259-260. ? Uredo TtotthoMixB Diet. — Syll. XVII, 



