PERISPOEIACEI. 



647 



1914. 



Uncinula bicoxnis. Lev. " Maple Blight." 



Amphigenous ; mycelium web -like, effuse, evanescent, or like 

 a membrane and persistent ; conceptacles large, hemispherical, 

 at length depressed ; appendages simple, bifid, or dichotomous, 

 uncinate ; sporangia 8, sub-pyriform, containing 8 spores. — Lev. 

 Ann. Sc. Nat. 1851, yix.p. 153, t. 1 J. 17. Cooke M.F.t.^x.f. 225- 

 228. Cooke exs. no. 93. Fckl. exs. no. 701. E. aceris, Tul. Carp. 

 i.p. 197, t. 2,/. 2, 3. E. bicornis, Eng. Fl.v.p. 327. A?/res, exs. 

 no. 78. 



On leaves of maples, &c. Common. 



1915. 



Uncinula Wallrothii. Lev, " Sloe Blight." 



Amphigenous ; mycelium web-like, evanescent ; conceptacles 

 minute, scattered ; sporanges 12-16, pear-shaped, 6-spored ; ap- 

 pendages numerous, twice the length of the diameter of the 

 conceptacles. — Lev. Ann. Sc. Nat. 1851, xv.p.loS, t. 7, f. 16. 

 Seem. Journ. iv. p. 97. Cooke M.F. ii. ed. p. 223. Erysiphe Pru- 

 nastri, D.C. Ft. Fr. vi. p. 108. Tul. Carp. i. p. 199. Erysiphe 

 adunca, Q^ Frunastri, Duhy.p. 870. Fr. S.M. \\\.p. 245. 



On the leaves of Prunus spinosa. October. 



This species is very closely allied to Uiiciivda adunca, from which the 

 length of the appendages, the number of sporanges, and of the spores, with its 

 evanescent mycelium, distinguish it. 



Gen. 280. 



PODOSFH^RA, Kunze. 



1916. 



Fig. 315. 

 Fodosphsexa Kunzei. 



Mvcelium effuse, web- 

 like, evanescent ; con- 

 ceptacles spheerical, con- 

 taining one, sub-globose, 

 8-spored sporangium ; 

 spores ovate ; append- 

 ages few, dichotomous, 

 thickened at their ex- 

 tremities, hyaline. — 

 Lev. Ann. Sc. Nat. 



{Fig. 315.; 



Lev. " Plum-leaf Blight." 



Amphigenous ; conceptacles minute, scattered, globose ; ap- 

 pendages three times the length of the diameter of the concept 



