MILDEWS, RUSTS AND SMUTS 
91 
rounded, slightly or not at all thickened, smooth, pale 
brown, tip darker, 20—3 3 X 17—22 p, pedicel tinged 
brown. 
Aecidia on Ranunculus bulbosus. 
Uredo-and teleutospores on Festuca ovina, and F. rubra. 
Uromyces ranunculi-festucae, Jaap. 
Pycnidia and aecidia present. 
Uredospores. Sori on the upper surface on yellow spots ; 
spores echinulate, yellow, 6—8 germ-pores. 
Teleutospores. Sori on yellow spots, rarely on dark 
spots, black; spores ovate, pear-shaped or oblong, tip 
rounded, truncate or slightly narrowed, smooth, pale 
brown, tip darker, 20—^40 x 15—22 p, pedicel tinged brown. 
Pycnidia and aecidia on Ranunculus bulbosus. 
Uredo-and teleutospores on Festuca ovina. 
MELAMPSORA, Castagne 
Pycnidia. Forming minute, circular, covered patches. 
Aecidia. Spores produced in chains, not enclosed 
in a peridium. 
Uredospores. Spores enclosed in a more or less well- 
developed peridium. 
Teleutospores. Spores i-celled, wedge-shaped, crowded 
into a compact, crust-like patch. 
The teleutospores on germination give origin to a pro- 
mycelium bearing secondary spores, as in Puccinia. 
The present genus has been divided in different ways by 
various authors, but the life-history of many so-called 
species is as yet unknown. 
Melampsora repentis, Plowr. 
Pycnidia. On yellowish spots on the leaves. 
Aecidia. Patches irregular, growing into each other, 
yellow ; spores subglobose or ovate, very minutely warted, 
yellow, 17—28 X 12—20 (X. 
Uredospores. Sori small; spores subglobose, minutely 
spinulose, 12—15 p, diam., orange ; paraphyses colourless, 
tip subglobose. 
Teleutospores. Sori yellow, then brown, finally blackish ; 
spores cylindrical, crowded and polygonal in section, brown, 
50-60 X 10-12 [JL. 
Syn. Caeoma orchidis, Alb. and Schw. ; Plowr., Ured., 
p. 261. 
Pycnidia and aecidia on Orchis maculata, 0 . latifolia 
and Lister a ovata. 
