SPEGAZZINI: MYCETES ARGEXTIXENSES. 315 



filiforme* rigidulae; sporae elliptico-obovatae mediocre* laeves 

 hyálinae. 



Jlab. Ad folia viva Eupatorii cujusdam prope Colonia Mo- 

 coví, Chaco, Xov. 1903. 



Obs. Maculae superne candidae inferné fuscescentes (1-4 

 mm drn.) determinatae, areola rufescente obsoleta cinctae; 

 columellae erectae v. flexuosae coriacellae (1-3 mm lng. = 

 5< 1-200 <x crss.) cylindraceae, e cellulis elongatis subhyalinis 

 dense constipatis coalescentibusque constitutae: sporae te- 

 nuissime tunicatae (12-15 :>■ = 10 ¡a) utrinque obtusae eguttu- 

 latae. 



441. Melampsora populina ( Jacq. ) Lev. = Sacc, Syll. fng. vn, 2, 

 p. 59i ). 



Hab. Vulgatissima ad folia Populi monüiferae La Plata, 

 Buenos Aires et Mendoza, per Aest. 19< 15-1908. 



Obs. Species recenter introducta, valde obnoxia. Uredospo- 

 rae globosae v. obovatae (18-35 \x = 16-21 » \x) tenui tunicatae 

 papillulosae; teleutosporae e cylindraceo obconicae (25 \x = 

 V> \x) tenui tunicatae dense constipatae utrinque subtrunca- 

 tae ferrugineae groase 1-guttulatae. 



442. Caeoma baccharidis (Lev.) Diet. ct Neg. = Sacc, Syll. fng. 

 xiv, p. 408. 



Hab. Ad folia Baccharidis rosmarinifoliae inmontanis pro- 

 pe Cacheuta, Mendoza, Febr. 1903 et 1908. 



443. Uredo andicola Diet. et Neg. = Sacc, Syll. fng. xiv, p. 390. 



Hab. Ad folia viva Rubiffeoidis in dumetis prope Ushuaia, 

 fiíart. 1903. 



Obs. A Tfi pirígena, maculis obsoletis insidentia; acervuli minu- 

 t i n > 25-1 K''' 1 1 mm dm.i solitarii v. bine inde 2-5-gregarii erum- 

 penti- superficiales pulverulenti pallide mellei; uredosporae 

 globosae (18-20 \> dm.) crassiuscule tunicatae dense minuteque 

 papillulosae, saepius mesosporis obovatis (20-25 \>. = 10-2* > m | 

 subhyalinis crasse tunicatis verruculosis stipite brevi conco- 

 lore fultis cinctae- 



444. Uredo andropogonicola Speg. (n. sp. I 



Diag. Hypophy la, linearis fusca erumpens subcompactiuscu- 

 la; uredosporis submajusculis obovatis continuis v. 2-3-blastis 

 verrvculosis ferrugineis paraphysibus clavulatis cinctis. 



líiili. Ad folia viva Andropogonis condqnsati prope Tucu- 

 mán, Apr. 1906. 



Obs. Maoulae nullae v. obsoletae fuscescentes; acervirli Ly- 



