ON GRAMINEE 127 
except by cultures ; see also under U. Poae. The teleuto-sori of the present 
species are more numerous and much more conspicuous than those of U. 
Poae, They resemble the spots of Phyllachora graminis on the same host. 
DIstRIBUTION : Europe only, not yet found in America. 
38. Uromyces Poe Raben. 
Aeidium crassum var. 8 Ficariae Pers. ; Sow. pl. 397, f. 4. 
42. Ranunculacearum DC.; Cooke, Handb. p. 539; Micr. Fung. 
p. 196, pl. ii, figs. 12—14, p.p. 
Uromyces Poae Rab. Unio itin. 1866, no. 38. Plowr. Ured. p. 131. 
Sydow, Monogr. ii. 310. Fischer, Ured. Schweiz, p. 72, f. 55. 
Spermogones. Epiphyllous, honey-coloured, a few also on 
the lower surface among the ecidia. 
Afcidiospores, AXcidia hypophyllous or on the petioles, in 
roundish clusters on yellow spots, which on the petioles are 
often elongated, cup-shaped, yellow, with torn, recurved margin ; 
spores delicately verruculose, clear-yellow, 17—25 x 12—20 p. 
Uredospores. Sori amphigenous, scattered or in rows, small, 
elliptic or oblong, at first covered 
by the epidermis, pulverulent, 
yellowish-brown; spores globose 
to ovate, faintly echinulate, yellow, 
14—25 x 14—20 yw; epispore 14— 
2 thick, with 4—9 germ-pores ; 
a few paraphyses occasionally 
intermixed. ; Fig. 78. U. Poae. Teleutospores 
Teleutospores. Sori generally | and the accompanying para- 
hypophyllous, similar to the uredo- PR ean 
sori, but always covered by the epidermis, compact and black ; 
spores oblong-ellipsoid to pyriform, rounded or truncate above, 
not much thickened (up to 4 or 5 y), smooth, yellowish-brown, 
apex alone darker, 17—28 x 14—20,y; epispore lip thick; 
pedicels brownish, as long as or shorter than the spore; para- 
physes numerous, brown, agglutinated, as in U. Dactylidis. 
Acidia on Ranunculus auricomus, R. bulbosus, R. Ficaria, 
R. repens, March—May; uredo- and teleutospores on Poa 
annua, P. nemoralis, P. pratensis, P. trivialis, May—September. 
(Fig. 78; see also Fig. 211.) 
