('i)-j rredinacePB, Melampsora. 



apparonter a^quatorialibus, minutis, obscuris; teleutosoris amphi- 

 genis, sparsis, irregularitor orbicularibus, coniluentibus 0,6-1 mm. 

 fliam., tenuissime elevatis, indehiscentibus, nitide brunneis; teleu- 

 tosporis massam compactam efformantibus, obscure catenulatis, 2-4 

 cellulis in quaquo serie, sporis ellipsoideis v. cuboideis, 18-35 « 10- 

 15, externis longioribus, tunica levi, cinnamomeo-brunnea, 2-3 [j.. 

 cr., in sporis exterioribus apice 7-9 [x. incrassata. 



[[ah. in foliis Crotonis calvescentis et sp. Mexico. 



4. Melampsora albertensis Arth, Bull. Torr. Bot. Club, XXXIII 2338 

 (1906j p. 517; North Amer. Fl. VII (1907) p 101 (sub Uredo). — 

 Uredosoris hypophyllis, numerosis, sparsis, rotundatis, 0,2-0,4 mm. 

 lat., mox nudis, pulverulentis, pallide flavis; paraphysibus nume- 

 rosis, sporis intermixtis, clavatis, 67-90 « 9-15, tunica hyalina, 3- 



5 ;j.. cr., levi, stipite solido; uredosporis lateraliter depressis, elli- 

 psoideis 23-27*16-19 v. 23-27*13-15, tunica hyaliua 1,5-2 [j.. 

 parieto compresso crassiori, 2,5-3,5, aequahter et sparse verrucoso- 

 echinulatis, sed maculis levibus omnino destituta; teleutosoris hypo- 

 phyllis, numerosis. parvis, irregularibus, distincte confluentibus, 

 circum uredosoris in greges plus minusve extensos dispositis, sub- 

 epidermicis, ceraceis, brunneo-aurantiacis ; teleutosporis prismaticis 

 25-39 « 10-13, tunica brunneo-aurata, levi, tenui, 1 [j.. c. cr., apice 

 crassiori 2-3 [j.., poro germinativo apicali conspicuo. 



Hah. in foliis Populi tremuloidis, Moraine Lake, Lag- 

 gan, Alberta, Canada (E. W. D. Holway). 



5. Melampsora Acalyphae Petch, Ann. R. Bot. Grard. Peradeniya IV. 2339 

 Pt. V (1909; p. 301. — Uredosoris irregularibus v. elongatis et 

 curvatis, epidermide rupta cinctis, maculis parvis nigris hypo- 

 phyllis Hmitantibus, macula in pagina superiori centro alba; ure- 

 dosporis in massa pallide brunneis, vitro auctis fere hyalinis, pi- 

 riformibus v. subglobosis, verrucosis, 27-34*24-28; teleutosporis 

 immaturis (?) immixtis, obscure griseis, oblongis, rectis v. curvis, 

 40-50*10-14. 



Ifah. in foliis Acalyphte fruticosas, Peradeniya Ceylon. 



6. Melampsora Laricis-Reticulatae 0. Schneid., Centralbl. f. Bakter. 234i) 

 II Abt. XV (1905) p. 233 et XVI (1906) p. 85 et pag. 167. — 

 Spocies biologica affinis Mel. Laricis-Betus(V E. Fisch. 



Ilah. cifomosporie in foliis Laricis deciduae, uredo- ct te- 

 leutospono in foliis Salicis reticulat» et S. hastatte, le- 

 niter iuficit Sal. herbaceam, in Helvotia. 



7. Melampsora Ribesii-Grandlfoliae 0. Schneid., Centralbl. f. Bakter. 23U 



