84 
MILDEWS, RUSTS AND SMUTS 
CYPERACEAE 
Uromyces scirpi, Burr. 
Pycnidia. Generally on the upper surface of the leaf. 
Aecidia. On the under surface of the leaves, or on the 
petioles, in clusters, edge revolute and split ; spores an¬ 
gularly globose, minutely warted, yellowish, i6—24 x 
14—20 p. 
Uredospores. Sori scattered or in lines, on the under 
surface of the leaves, minute, rounded or oblong, powdery, 
cinnamon ; spores subglobose, ovate or oblong, minutely 
echinulate, yellowish-brown, 22—35 X 16—25 p, 3 equatorial 
germ-pores. 
Teleutospores. Sori on both surfaces of the leaves, on 
indeterminate discoloured spots, scattered or arranged 
in lines, for a long time covered by the epidermis, dusky 
brown ; spores ovate, oblong or pear-shaped, tip generally 
narrowed, thickened, base narrowed, smooth, pale brown, 
26—^45 X 15—24 p, pedicel tinged brown. 
S3m. Uromyces maritima, Plowr. 
Aecidium glaucis, Plowr., Ured., p. 268. 
Pycnidia and aecidia on Glaux maritima, Hippuris vul¬ 
garis, Dauca carota, Pastinaca saliva, Smm latijolium. 
Uredo- and teleutospore stages on Scirpus maritimus. 
Europe generally ; N. America. 
Plowright observed that the teleutospores found on 
Scirpus maritimus produced aecidia on Glaux maritima and 
named the teleutospore form Uromyces maritima {Gard. 
Chrou.., i8go, pp. 682 and 746), not being aware that it 
had been named Uromyces scirpi by Burrill, in the 
United States, in 1885. 
GRAMINACEAE 
Uromyces dactylidis, Otth. ; Plowr., Ured., p. 130. 
Pycnidia. On the upper surface of the leaves, honey- 
colour, also scattered amongst the aecidia on the under 
surface of the leaves. 
Aecidia. On the under surface of the leaves, and on the 
petioles, on yellowish spots, yellowish, edge recurved and 
slightly torn ; spores subglobose, minutely warted, pale 
yellow, 15—25 p. 
Uredospores. Sori on both surfaces of the leaf, scattered 
or arranged in lines, for a long time covered by the epider¬ 
mis, then powdery and yellowish-brown ; spores globose, 
rarely ovate, minutely echinulate, yellow or yellowish- 
brown, 18—32 X 18—25 p, 7—9 germ-pores, no paraphyses. 
