MILDEWS, RUSTS AND SMUTS 127 
along with the teleutospores, which is not the case with 
Puccinia violae. 
The mycelium is perennial, infected plants becoming 
deformed and pale in colour. 
Puccinia fergussoni, Berk, and Broome; Plowr., Ured., 
p. 207. 
Teleutospores. Sori on large, rounded or irregular, 
yellowish spots, on the under surface of the leaves, rarely 
on the upper surface, and on the leafstalks, densely clustered 
and often growing into each other, for a long time covered 
by the epidermis, then powdery and brown ; spores ir^ 
regular in form, generally oblong and narrowed at the ends, 
rarely rounded at the ends, tip thickened, slightly con¬ 
stricted at the septum, smooth, yellowish-brown, 30—50 
X 15—20 p, pedicel thin, colourless, deciduous. 
Syn. Puccinia nidificaus, Magnus. 
On Viola palustris. Britain, Europe, and N. America. 
Distinguished amongst the species occurring on species 
of Viola by the large clusters of crowded sori. 
BALSAMINACEAE 
IMPATIENS 
Puccinia argentata, Winter; Plowr., Ured., p. 193. 
Uredospores. Sori minute, powdery, scattered or in 
rings on yellowish spots on the under surface of the leaf, 
ochraceous or pale cinnamon colour ; spores subglobose 
or broadly elliptical, very minutely echinulate, pale yellow, 
three to five germ-pores, 18—25’* X 15—20 p. 
Teleutospores. Sori minute, more or less circular, soon 
naked, chestnut-brown, scattered or in rings on minute 
yellowish or brownish spots ; spores elliptical, ovate or 
somewhat club-shaped, with a colourless, usually oblique 
point at the tip, not at all, or very slightly constricted at 
the septum, smooth, pale brown, 25—^40 X 15—25 p, 
pedicel colourless, short, slender. 
S^n. Puccinia ncli-tangeris, Corda. 
On Impatiens noli-me-tangere, I. fidva, and other cul¬ 
tivated species. Britain, Europe, N. America, and Japan. 
BUXACEAE 
BUXUS 
Puccinia buxi, D.C.; Plowr., Ured., p. 217. 
Teleutospores. Sori scattered or crowded, wart-like. 
