ON POPLAR 347 
Plants of the Salix were brought from Scotland and cultivated at 
Walton, near Liverpool; there were then uredospores only. When the 
leaves fell, they were left on the ground, and two teleuto-sori were developed 
on them, of a rufous black colour. I have not seen the specimens. 
10. Melampsora populina Lévy. 
Melampsora populina Lévy. Ann. Sci. Nat. 1847, p. 375. Cooke, 
Handb. p. 523; Micr. Fung. p. 219. Plowr. Ured. p. 242. Sace. 
Syll. vii. 590. 
(1) MELAmpsorA ALLII-POPULINA Kleb, 
Caeoma Alliorum Link ; Plowr. Ured. p. 261 p.p. 
M. populina Cooke, Micr. Fung. pl. 9, f. 195, 196. 
Melampsora Allii-populina Keb. in Zeitschr. f. Pflanzenkr. 1902, xii. 
25. Fischer, Ured. Schweiz, p. 504. 
Spermogones. Pulvinate, projecting. 
Aicidiospores. Ceomata about 1 mm. wide, mostly in 
groups on yellowish-white spots on the leaves, surrounded by 
the epidermis, bright orange-red; spores roundish or oval or 
polygonal, 17—23 x 1419»; epispore about 2, thick, but 
sometimes thicker and then obviously thin at certain spots 
(?germ-pores), verruculose. 
Uredospores. Sori hypophyllous, or even rarely epiphyllous, 
round, scarcely 1 mm. wide, surrounded by the epidermis, 
causing yellowish spots, bright reddish-orange; spores distinctly 
YL 
Fig. 260. i. Allii-populina, a, teleutospores ; b, paraphysis ; c, uredospores. 
On Populus nigra. 
oblong or clavate, rarely oval, 24—38 x 11—18,; epispore 
2—4 thick, with sunken places (? germ-pores), sometimes 
thicker at one end, but without any equatorial thickening, 
distantly echinulate, but smooth above; paraphyses mostly 
capitate, 50—60 x 14—22 », with a wall uniformly 2—3 4 
thick. 
