MILDEWS, RUSTS AND SMUTS 
155 
Puccinia phalaridis, Plowr. 
Pycnidia. On the upper surface of the leaves. 
Aecidia. On the under surface of the leaves, on more or 
less circular, yellowish spots, not very prominent, edge 
white, torn ; spores angularly globose, echinulate, yellowish, 
15—26 p, diam. 
Uredospores and teleutospores as in Puccinia sessilis. 
Syn. Puccinia ari-phalaridis, Klebahn. 
Puccinia ari, Lagerheim. 
The aecidia appear on the living leaves of Arum macula- 
turn, and perhaps on Arum italicum. 
Uredospores and teleutospores on living leaves of Phalaris 
arundinacea. 
Britain, Europe generally, and perhaps in N. America. 
« 
PHRAGMITES 
Puccinia magnusiana, Koern. ; Plowr., Ured., p. 177. 
Aecidia. On the under surface of the leaf, on the leaf¬ 
stalks, and on the stem, on yellow, more or less circular 
spots, cup-shaped, whitish, edge torn ; spores subglobose, 
minutely warted, yellowish, 15—25 p, diam. 
Uredospores. Sori on both surfaces of the leaves, usually 
scattered, minute or medium size, elliptical or oblong, 
powdery, pale yellowish-brown; spores subglobose, ovate 
elliptical, minutely echinulate, yellowish-brown, 20—^35 
X 12—20 p,, germ-pores indistinct, paraphyses numerous, 
club-shaped, colourless or tinged brown. 
Teleutospores. Sori on both surfaces of the leaves, scat¬ 
tered, or more or less crowded over the entire surface, 
minute or medium size, oblong or narrow, often forming 
long narrow streaks on the culm, compact, flat, blackish ; 
spores oblong or club-shaped, tip rounded or rarely narrowed 
or truncate, thickened, scarcely narrowed at the septum, 
base narrowed into the pedicel, smooth, brown, tip darker, 
32—55 X 16—26 p,, pedicel thick, tinged brown, persistent, 
equal to or shorter than the spore. 
Syn. Puccinia graminis, Pers., var. arundinis, Cooke. 
Aecidium ranunculacearum, D.C. 
The aecidia grow on the leaves, leafstalks, and stems 
of Ranunculus bulbosus, and R. repens. 
The uredospores and teleutospores on the leaves of 
Phragmites communis. 
Britain, Europe, S. Africa, and Japan. 
