■27-2 



PUCCINIA 



JZcidiospores. /Ecidia hypophyllous in small clusters on 

 yellowish spots, or on tin- petioles or stems t'uniiing elongated 

 groups, cup-shaped, with a cut white margin; spores densely 

 and finely verruculose, yellowish, 15 — 25 fi. 



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 — 35 x 12 — 20/&; germ-pores indis- 

 tinct : paraphyses numerous, clavate, hyaline or pale brownish. 



71.5. 





Fig. 207. P. ~Ma.gnvsia.na. a, Teleutospores (one abnormal): b, paraphysis 

 with uredospores; c, sori on leaf, and </. 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 striae 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/*), hardly constricted, attenuated downwards, smooth, 

 brown, darker above, 32 — 55 x 16 — 26 p\ pedicels thick, 

 brownish, persistent, as long as or shorter than the spores. 



^Ecidia on Ranunculus bulbosus, B. repens, April — June or 

 even July and August; uredo- and teleutospores on Phragmites 

 communis. June — April. Not uncommon in suitable localities. 

 (Fig. 207.) 



