ON WILLOW 339 
above where it is pierced by an evident laterally placed germ- 
pore. 
Ceomata on Larix europaea; uredo- and teleutospores on 
Salia Caprea, more rarely on S. awrita and other Salices. The 
commonest species. (Figs. 254, 255.) 
The teleutospores germinate the following spring. They are distin- 
guished from those of all the allied species by being thickened above. 
Plowright remarks that the czeoma is not uncommon early in the year on 
Larch foliage, but is very inconspicuous and easily overlooked ; he found 
the zcidiospores, in company with the uredospores on 8. Caprea, at West 
Malvern, June, 1900. But it is almost impossible to say, without experi- 
ment, to which form of Melampsora any given coma on Larch is to be 
assigned. . 
Plowright’s If. farinosa seems to be chiefly this species, but several of 
the allied forms are continually recorded under the same name. The 
reddish teleuto-sori on the upper side of the leaf, are distinctive and are 
easily found by looking for them from September onwards. It may be 
mentioned here that both uredo- and teleutospores of the Melampsoras on 
Willow and Poplar germinate readily : if the germinating uredospores are 
placed upon healthy leaves and kept in a damp chamber, infection usually 
follows in 7—10 days. 
2. Melampsora Euonymi-Caprearum Kleb. 
Uredo confluens var. Euonymi Mart. Flor. Mosq. p. 280. Cooke, 
Handb. p. 527. 
U. Euonymi Cooke, Micr. Fung. p. 216. 
Cacoma Euonymi Plowr. Ured. p. 260. 
Melampsora Euonymi-Caprearum Kleb. in Pringsh. Jahrb. f. Wissensch, 
Bot. 1900, xxxiv. 358. Fischer, Ured. Schweiz, p. 489. 
Spermogones. Flatly pulvinate. 
4cidiospores. Cxeomata mostly hypophyllous, bright-orange, 
in elongated clusters on orange spots, }—1 mm. diam.; spores 
oval, rarely oblong, 18-23 x 1419 4; epispore thick (up to 
5 w), finely and densely verrucose. 
Uredospores. Sori hypophyllous, on discoloured spots which 
show distinctly on the upper side, small, } mm. wide, pulvinate, 
single or in groups; spores mostly roundish, orange, 14—19 x 
14—17 p, distantly echinulate without smooth spots ; epispore 
thin, or at times thickened (up to 4), with several germ- . 
22—2 
