ON GRAMINEA: 251 
often confluent and reaching a length of 1 cm. or more, 
surrounded by the cleft epidermis, pulverulent, yellow-brown ; 
spores ellipsoid or ovate-oblong, echinulate, yellow-brown, then 
yellowish, 22—42 x 16—22 w, generally with four equatorial 
germ-pores. 
Cc 
Fig. 193. P. graminis. a, ecidia Fig. 194. P. graminis. 
on Berberis; b, uredo- and c, Teleuto- and uredo- 
teleutospores on wheat. spore on Aira caespi- 
tosa.. 
Yeleutospores. Sori similar, but forming long lines, soon 
naked, pulvinate, black ; spores oblong-clavate, rounded or atten- 
uated at the summit, much thickened (6—13 ,), slightly con- 
stricted, attenuated’ below, smooth, chestnut-brown, 35—60 x 
12—22 »; pedicels brownish, persistent, thick, as much as 60 » 
long; paraphyses always absent. 
AKcidia on leaves and fruits of Berberts vulgaris and Mahonia 
Aquifolium ; uredo- and teleutospores on Agropyron caninum, 
a. repens, Agrostis alba, A.canina, A. vulgaris, Aira cauespitosa, 
A. fleauosa, Alopecurus pratensis, Arrhenatherum elatius, Avena 
fatua, A. sativa, Brachypodium pinnatum, Bronus arvensis, 
B. asper, B. erectus, B. giganteus, B. mollis, B. secalinus, Dac- 
tylis glomerata, Festuca Myurus, PF. ovina, F. rubra, Holcus 
lunatus, H. mollis, Hordeum murinum, H. pratense, H. vulgare, 
Lolium perenne, Milium effusum, Molinia caerulea, Phalaris 
cunariensis, Poa compressa, P. nemoralis, P. pratensis, P. 
