MILDEWS, RUSTS AND SMUTS 
149 
blackish ; spores oblong club-shaped or club-shaped, tip 
rounded, sometimes obliquely narrowed, not at all, or only 
very slightly thickened, generally slightly constricted at the 
septum, base generally narrowed, smooth, brown, 36—50 
X 14—18 [i, pedicel short ; paraphyses numerous, brown. 
Syn. Aecidhtm asperifolii, Pers. (in part). 
Uredo bromina, Eriksson. 
Aecidia are developed on the leaves, leafstalks, and sepals 
of Symphytum officinale. 
Uredospores and teleutospores on Bromus arvensis, 
B. asper, B. sterilis, B. maximus, and other species of 
Bromus. Britain, Europe generally, and Asia Minor. 
Puccinia triticina, Erikss. 
Uredospores. Sori on both surfaces of the leaves, most 
frequent on the upper surface, scattered, oblong, medium 
size, rusty ; spores subglobose, echinulate, yellow, 20—27 p 
diam. 
Teleutospores. On the under surface of the leaves, and 
on the culms, scattered, or often in rows on the culm, oblong, 
covered by the epidermis, blackish ; spores club-shaped or 
oblong club-shaped, tip rounded or obliquely narrowed, 
scarcely thickened, slightly constricted at the septum, base 
narrowed, smooth, brown, 30—45 X 12-—20 p, pedicel 
short ; paraphyses numerous, brownish. 
Syn. Uredo triticina, Eriksson. 
Occurring on the leaves and culms of Triticum vulgaris 
and T. spelt a. 
Britain, Europe generally, and N. America. 
AGROSTIS 
Puccinia agrostidis, Plowr. 
Pycnidia. Honey-coloured, on roundish spots. 
Aecidia. Sori on the under surface of the leaves, on 
circular or irregular, yellowish spots that often have a 
brownish border, or in oblong, inflated patches, shortly 
cylindrical, edge white, torn ; spores angularly globose, 
very delicately warted, 16^—30 X 14—20 p. 
Uredospores. Sori on both surfaces of the leaves, on 
elongated, narrow, yellowish spots, bright orange ; spores 
subglobose or ovate, yellow, minutely echinulate, 21—25 
X 16—22 p. 
Teleutospores. Sori on the under surface of the leaf, 
minute, oblong or narrow, sometimes crowded, covered by 
the epidermis, blackish ; spores more or less club-shaped, 
