522 C^OMACEI. 



1558. Melampsora salicina. Lev. " Willow Brand." 



Summer-spores. Epiphyllous or hypophyllous, sori, or heaps 

 of spores scattered, pale orange, bright orange, or cinereous. 

 (June to August.) Ovato-globose, parapliyses capitate, rarely 

 obovate. — Lecythea caprearum. Lev. Ann. Sc. Nat. Uredo cap- 

 reanun. Eng.Fl. Y.p. 385. U. epitea. Kze. Lee. epitea Ann. N.H. 

 no. 477. 



Winter-spores. Sori epiphyllous, scattered or aggregate, 

 at first yellowish tawny, then brownish, at length nearly black, 

 buUate ; spores oblong, closely packed, and laterally compressed. 

 — Lev. Ann. Sc. Nat. Tul. Ann. Sc. Nat. 4, ser. vol. ii. t. 7,f. 6-7. 

 Cooke M.F.t.d, f. 191, 192. Cooke exs. no. 85. Cooke L.F. no. 

 49. 



On Salix viminalis and >S'. caprcea. Common. 



Spores perfected in February. (Fig. 213, ydnter spores.) 



1559. Melampsora betulina. Besm. "Bircli Brand." 



SuiiMER-spoRES. Hypopliyllous, sori bright yellow or orange, 

 oblong, cylindrical, or obovate, truncate at the base, echinulate ; 

 paraphyses encircling, or intermixed, obovate, smooth, hyaline. 

 Uredo betuUna. U.cylindrica. Eng.Fl.^. p. Z^h (partly.) Lecy- 

 thea hetulina. Lev. Ann. Sc. Nat. 



WiXTER-spoRES. Sori confluent, of an obscure brown in the 

 winter, becoming of a bright orange when mature ; spores elon- 

 gated, attenuated below, polygonal, ochraceous. — Lev. Ann. Sc. 

 Nat. Desm. exs. no. 1647. Lib. exs. no. 236. Cooke. M.F.t.9,f. 

 189, 190. Tul. Ann. Sc. Nat. ser. 4, vol. ii. t. 7, /. 8, 9. Cooke exs. 

 no. 124. 



On leaves oi Betula alba. 



Spores perfected in Jan. and Feb. (Fig. 212, winter spores.) 



1560. Melampsora tremulae. Tul. " Aspen Brand." 



Summer-spores. Hypophyllous; sori punctiform, prominent, 

 or papillgeform, numerous ; spores tawny-yellow, elliptical, or 

 obovate; paraphyses slender. — Uredo cylindrica. Eng. FI.y. p. 

 Z'^b, partly. Lecythea populina. Cooke M.F. p. 206, partly. 



Winter-spores. Sori scattered, at length blackish ; spores 

 elongated, compressed, attenuated downwards, yellowish. — TuL 



