UREDINACEAE 423 



more or less covering the outer surface of cone scales ; 

 spores oblotig-polyhedric, about, 24-33 X 18-22 p, warted, 

 areolate, orange-yellow. 



Peridermium elatinum, Kze. and Schw., D. Schw., 

 No. 142. Spermogonia immersed, conoidly prominent, 

 honey-colour; aecidia hypophyllous, in 1-2 rows, white, 

 irregularly torn ; spores elliptic or polygonal, 16-30 X 14-17 

 /*, epispore hyaline, coarsely warted, contents orange. 



Uredo, Pers. Sori generally orange-yellow, subpul- 

 verulent, superficial or erumpent, pseudoperidium absent ; 

 uredospores formed singly at the tips of fertile hyphae. 



Uredo vitis, Thiim., Die Pilze des Weinstockes, p. 182. 

 Sori hypophyllous, usually minute and more or less 

 crowded, bright yellow, resembling minute aecidia under a 

 lens, due to the elevated margin composed of paraphyses ; 

 spores piriform or broadly elliptical ; epispore thin, minutely 

 verruculose, colourless, contents orange-yellow, i8-3ox 

 15-18 /A; paraphyses colourless, cylindrical, slightly curved, 

 33-35 X 7-9 P- 



Uredo cannae, Wint, Hedw., 1884, p. 172. Sori 

 generally hypophyllous, rarely also epiphyllous, without 

 spots, either densely scattered over the entire surface, or 

 collected in groups, minute, pale yellow, for a long time 

 covered by the epidermis ; spores variable in form, 

 yellowish, echinulate, 25-45 x 16-23 /* 



SPHAEROPSIDIACEAE 



Fungi with perithecia containing conidia borne at the 

 tips of slender conidiophores ; asci absent. 



Probably representing phases in the life-cycle of asciger- 

 ous fungi. 



