646 



PEEISPOrvIACEI. 



Gen. 278. 



PHYLLACTXNZA, Lev. 



Perithecia hemispherical, at 

 length depressed, seated on a 

 persistent or evanescent mem- 

 branaceo-granular receptacle ; 

 appendages straight, rigid, aci- 

 cular, at length bent back. — 

 Berk. Outl.p. 404. {Fig. 313.) 



1912. Fhyllactinia guttata. 



Lev. " Hazel Blight." 



Amphigenous ; mycelium web- 

 like, often evanescent; concep- 

 I^g, 313. tacles large, scattered, hemis- 



pherical, at length depressed ; 

 appendages hyaline, rigid, simple ; sporangia 4-20, containing 

 2-4 sporidia. — Lev. Ann. Sc. Nat. 1851, xv. p. 144, t. 7, /. 11. 

 Cooke M.F. t. xi./. 219, 220. Cooke exs. no. 92. Fckl. exs. no. 702- 

 710. Fry siphe guttata, Fng. Fl. v. p. 327. Baxt. exs. no. 96. Tul. 

 Carp. i.p. 194, t. i. Bej^k. exs. no. 205. 



On leaves of hawthorn, hazel, ash, elm, alder, beech, birch, 

 oak, hornbeam, &c. Common. [United States.] 



(Fiff. 313, concepfacle magnified 300.) 



Gen. 279. UNCINULA, Lev. 



Mycelium floccose ; perithecia glo- 

 bose ; appendages rigid, simple, bifid, 

 or dichotomous, uncinate, at length 

 bent upwards. — Berk. Outl. p. 404. 



(Fig. 314.) 



1913. Uncinula adunca. Lev. 



'• Willow Blight." 



Mycelium variable ; conceptacles 

 Yig, 314. scattered or gregarious, minute ; ap- 



pendages simple ; sporangia 8-12, 

 sub-pyriform, containing 4 spores. — Lev. Ann. Sc. Nat. 1851, xv. 

 p.lb0,t.7,f. 15. Cooke M.F. t. xi. f. 221-224. Fckl. exs. no. 

 699-700. F. Salicis, Tul. Carp. i.p. 198, t. 2. /. 1. E. adunca, 

 Eng. Fl. v. p. 327. Grev. t. 296. Baxt. exs. no. 95. 



On leaves of willows, poplars, birch, &c. [United States.] 



{Fig. 314j conceptacle magnified.) 



