MILDEWS, RUSTS AND SMUTS 
169 
UREDO 
Spores produced singly at the tips of slender hyphae, 
forming sori. 
Uredo agrimoniae, D.C. 
vSori roundish or irregular, often crowded and covering 
a large space on the under surface of the leaves ; spores 
subglobose or ovate, minutely warted, orange, 17—23 
X 14—17 p. 
On Agrimonia CMpatoria. 
Nature doubtful. Plowright says the sori are covered 
by rather thin pseudoperidia. 
Uredo symphyti, D.C. 
Sori minute, very numerous, yellow, on the under surface 
of the leaf; spores subglobose or ovate, minutely echinulate, 
yellow, 25—-35 X 16—24 p. 
On SymphvtMm officinale. 
Is this identical with the uredo form of Puccinia hromina, 
Eriksson ? 
Uredo mulleri, Schroeter. 
Pycnidia on the upper surface of the leaf, on circular 
yellow spots. 
Sori on both sides of the leaf, golden-yellow, often in 
rings ; spores globose, echinulate, orange, 18—20 p diam. 
On leaves of bramble— Rubus fruticosus. 
Uredo quercus. Brand. 
Sori on the under surface of the leaves, circular, minute, 
scattered or clustered; spores subglobose, echinulate, 
orange-yellow, 15—25 X 12—15 p. 
On leaves of oak— Quercus pedunculata. 
Uredo tropaeoli, Desm. 
Sori minute, circular, scattered or crowded on pale 
yellow spots on the under surface of the leaves ; spores 
ovoid or subglobose, orange. 
On cultivated plants of Tropaeolum aduncum. 
Uredo lynchii, B. and Br, 
Sori small, pale, scattered, rarely clustered ; spores 
yellow, obovate, echinulate, with short pedicels, 20 —30 
X 28—35 p. 
On exotic, cultivated species of Spiranthes. 
Uredo polypodii, Pers. 
This is now included under Milesia. 
Uredo scolopendri, Fuckel. 
This is now included under Milesia. . 
