272 PUCCINIA 
Acidiospores. Aicidia hypophyllous in small clusters on 
yellowish spots, or on the petioles or stems forming elongated 
groups, cup-shaped, with a cut white margin; spores densely 
and finely verruculose, yellowish, 15—25 p. 
Uredospores. Sori amphigenous, scattered, rarely confluent, 
elliptical or oblong, 1—2 mm. long, pulverulent, pale yellowish- 
brown ; spores mostly ovate or ellipsoid, delicately echinulate, 
pale brownish-yellow, 20—85 x 12—20; germ-pores indis- 
tinct ; paraphyses numerous, clavate, hyaline or pale brownish. 
a 
5 
Fig, 207, P. Magnusiana. a, Teleutospores (one abnormal); b, paraphysis 
with uredospores; ¢, sori on leaf, and d, sori on stem of Phragmites. 
Teleutospores. Sori amphigenous, very numerous, usually 
scattered over the whole leaf-surface, oblong or sublinear, 
minute, 1—2 mm. long, or on the culms and leaf-sheaths forming 
narrow striz several centimetres long, flat, compact, persistent, 
blackish: spores oblong or clavate, rounded above or rarely 
conically attenuate or truncate, with .a distinct thickened cap 
(5—10 p), hardly constricted, attenuated downwards, smooth, 
brown, darker above, 32—55 x 16—26 4; pedicels thick, 
brownish, persistent, as long as or shorter than the spores. 
Aeidia on Ranunculus bulbosus, R. repens, April—June or 
even July and August; uredo- and teleutospores on Phragmites 
communis, June—April. Not uncommon in suitable localities. 
(Fig. 207.) 
