UREDINOPSIS 379 
UREDINOPSIS Magnus. 
Teleutospores solitary, extracellular, hyaline, septate. Uredo- 
sori subepidermal, with a distinct peridium ; uredospores hyaline, 
pedicellate, without germ-pores. On Ferns. 
This genus is distinguished from all others by the fact that 
the teleutospores are dispersed without order among the cells 
of the mesophyll. There are three known forms of spores, 
which seem to occur simultaneously, and not in a fixed order of 
succession as in most pleomorphic Uredinales. It is one of the 
lowest genera from the point of view of organisation; and its 
cytological investigation would doubtless yield a rich harvest of 
new ideas, 
Not yet discovered in Britain. . 
Uredinopsis filicina Magn. 
Protomyces ? filicinus Niessl, in Rab. Fung. Europ. no. 1659, 1873. 
Uredo Polypodii var. Phegopteris Winter, Pilze, p. 253. Sacc. Syll. 
vil. 858, . 
Uredinopsis filicina Magn. Atti Congress. Bot. Internaz. 1892, p. 167. 
Fischer, Ured. Schweiz, p. 476, f. 310, 311. 
Uredospores. Sori hypophyllous, small, roundish, thickly 
scattered, yellowish-brown, of two kinds—(1) smaller, about 
- 
b, uredospores (no. 2) and paraphysis; c, teleutospores. From a German 
specimen, issued by Sydow. 
4 mm. diam., flattish, semi-transparent, always situated beneath 
a stoma, surrounded by a rather tough peridium, rupturing 
above; spores ;iore or less obovate-polygonal, on slender 
“8 
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