840 Uredinales, Melanipsoraccie, Melanipsorea), Chuoospora. 



diug-, Sci. Js\ S. 33., 1911, p. 194. 



21. Melampsora Pruinosae Tranzsch. iu Trauz. et Screbr., Mycotb. 289 

 Ross. n. 265 (1912), Syd., Mon. Ured. III p. 345. — Uredosoris am- j 

 pliigenis, maculis minutis nigricantibus subinde insidentibus, sparsis 



V. paucis aggregatis, saepe per totam folii superficiem distributis, 

 miuutissimis, pallide aurantiacis ; uredosporis subglobosis, ovatis 

 V. ellipsoideis, densiuscule verruculoso-ecbiuulatis 20-28^16-18, 

 episporio ubique aequali 3-4 {x cr. ; parapbysibus capitatis v. cla- 

 vato-capitatis, byalinis, 45-60 [i long., superne 16-20 iji latis, mem- 

 brana ubique aequaliter crassa ca. 1,5-4 n; teleutosoris ampbigenis, 

 subepidermicis, minutis v. mediocribus, rufo-bruuneis; teleutosj)oris 

 prismaticis, flavidis, apice non incrassatis, 40-50 ^ 10-18. 



Hah. in foliis P o p u 1 i p r u i n o s a e , ad fluv. Amu-Daria, 

 Turcomaniae. 



22. Melampsora pulcherrima Maire, Myc. Bor. Afr. fasc. 5., 1914, n. 108, 28E 

 Bull. Soc. bot. de Fr. 61., 1914, p. XXI et Bull. Soc. Hist. is"at. 

 Afrique du Nord 1915, p. 139. — Stat. sperm. et aecid. Caeonia 

 pulcherrimum Bub. s. 1., Syll. XVII p. 459.— Soris uredosporiferis 

 vix maculigenis sparsis v. gregariis, minutis (0,8-1 mm.) aurantiacis 

 plerumque bypopbyllis mox nudis pulveraceis undique parapby- 

 satis; uredosporis ovoideis v. subglobosis, rarius elongatis 18-23 * 

 14-18, episporio byalino usque ad 2,5 [i crasso, laxe verrucoso-ecbi- 

 nato, contentu oleso aurautiaco, parapbysibus numerosis clavato- 

 capitalis 35-50 * 18-25, membrana byaliua apice usque ad 4 incras- 

 sata, laevi instructis ; soris teleutosporiferis miuutis (0,1-0,8 mm.) 

 bypopbyllis vix maculigenis, in tomento albo aegre detegentibus, 

 rufo-brunneis subepidermicis; teleutosporis subprismaticis, utrinque 

 rotundatis, 25-50 ^ 7-9, episporio rufo-brunueo, levi, tenui, apice vix 

 incrassato. 



Hab. aecidia in caulibus foliis floribusque M e r c u r i a 1 i s a n- 

 nuae var. ambiguae (L.) Batt., uredo-teleutosporae in foliis 

 P o p u 1 i a 1 b a e subsp. n i v e a e (Willd.) (integerrimae), 

 Algeria, Africa bor. — AfiBnis Mel. Bostrupii. 



Species gen. Melampsorae secundum ordinem alpbabeticum Familiarum 

 et Geuerum matricarum (st. teleut.) dispositae : 



Asclepiadaceae 1 — Euphorbiaceae 2-5 — Geraniaceae 6 

 Hypericaceae 7 — Salicaceae S-22 



CHNOOSPORA Diet. — Syll. XXI p. 600. 



