127 



NEW CALIFORNIAN UREDINE^.— II. 



By P. DiETEii. 



Uredo laeYiuscula, D. & H. Sori hypophyllous, scat- 

 tered, minute, hemispherical, long covered by the epidermis, 

 enclosed in a pseudoperidium closely pressed to the epider- 

 mal tissue. Spores very irregular, mostly pyriform or 

 oblong, often angular, 30 — 40x15 — 22 /i. Membranes color- 

 less, smooth or nearly so. 



On Polypodium Californicum. Mi Tamalpais, May, 1893, 

 leg. W. C. Blasdale. 



The spores of this species remain enclosed a very long 

 time in the pseudoperidium formed by flat sterile cells. In 

 microscopical sections not too thin through a sorus the whole 

 space between the peridium and the hymenium is closely 



M r 



filled with spores. It is to this mutual pressure that the very 

 irregular form of the spores is due. 



Uredo Pteridis, D. & K. Sori hypophyllous, small, oblong, 



extending along the primary and secondary veins of the 

 leaves, yellow when fresh, afterwards turning pale. Spores 

 ovoid to pyriform, with colorless echinulate membranes, 



30—45x18—27 //. 



On Pteris aqttilina. Pasadena, Jan., 1893, leg. A. J. 

 McClatchie- 



This is distinctly different from the common Uredo Poly- 

 podii (Pers.) and the similar Uredo AspidiotuSy Pk. by the 

 spiuosity of the epispore, whereas the echinulate Uredo 

 Scolopendrii (Fckl.) differs by its general appearance as well 

 as by the form of the spores. 



Puccinia McCIatchieana, D. & H. Hypophyllous; sori 



punctiform, pulvinate, scattered or disposed along lines; but 

 without tendency for flowing together. Teleutospores very 

 slender, club shaped or fusiform, truncate or rounded or 

 obconical at the apex, thickened, 6 — 11 //, attenuated below, 



constricted at the septum, smooth, brown, 40—75x18 — 23 y. 



Ebtthea, Vol II., No. 8, [1 August, 1894]. 



