MILDEWS, RUSTS AND SMUTS 
85 
Teleiitospores. Sori generally on the under surface of 
the leaves, minute, roundish or elongated, scattered or in 
irregular lines, sometimes growing into each other and form¬ 
ing large sori, for a long time covered by the epidermis, 
compact, blackish ; spores generally ovate, sometimes 
irregularly rounded, or oblong, apex rounded, rarely trun¬ 
cate, not at all or only slightly thickened, darker, yellowish- 
brown, 18—30 X 14—20 p, pedicel tinged brown, para- 
physes tufted, brown. 
Syn. Aecidium raniinculacearum, D.C. 
Pycnidia and aecidia on Ranunculus hulhosus, R. acris. 
Uredospores and teleutospores on Dactylis glomerata. 
Europe generally. 
Uromyces poae, Rabenh. ; Plowr., Ured., p 131. 
Pycnidia. On the upper surface of the leaf, also mixed 
with aecidia on the under surface of the leaf, honey-colour. 
Aecidia. On the under surface of the leaves, and on 
the petioles in round clusters, on yellowish spots, or in 
elongated lines on the petioles, yellowish, edge recurved 
and torn ; spores subglobose, minutely warted, yellowish, 
17—25 X 12—20 p. 
Uredospores. Sori on both surfaces of the leaf, scattered 
or in lines, elliptical or oblong, covered by the epidermis, 
then powdery, yellowish-brown ; spores subglobose, ovate 
or elliptical, minutely echinulate, yellowish, 14-—26 x 
14—20 p, 4^—9 germ-pores, paiaphyses sometimes present. 
Teleutospores. Sori generally on the under surface of 
the leaves, scattered or in rows, minute, or running into each 
other and forming large sori, covered by the epidermis, 
compact, blackish ; spores ovate, elliptical or pear-shaped, 
tip rounced or truncate, not at all, or very slightly 
thickened, smooth, yellowish-brown, tip darker, 17—28 
X 14—20 p, pedicel tinged brown, paraphyses tufted, 
brown. 
Syn. Aecidium crassum, var. jicariae, Pers. 
Aecidium ranunculacearum, D.C. 
Aecidium confertum, Grev. 
Pycnidia and aecidia on Ranunculus auricomus, R. 
bulbosus, R. repens, R. ficaria. 
Uredo- and teleutospores on Poa annua, P. bulbosa, P. 
compressa, P. pratensis, P. trivialis, Agrostis alba. Europe 
generally ; Asia Minor. 
Morphologically close to U. dactylidis, distinguished by 
the smaller uredospores. Biologically distinct. 
