ON RANUNCULACEX 215 
Teleutospores. Sori hypophyllous, scattered or gregarious, 
often occupying the whole leaf, roundish, 
soon naked, pulverulent, dark-brown ; 
spores much constricted, not thickened 
at the apex, the upper cell nearly 
globose, the lower globose, obovoid or 
clavate, generally narrower; the spores 
separate readily into their component 
cells, are covered with large pointed 
warts, dark-brown (the lower cell paler), _, Fed 
Fig. 163. P. Thalictri. Te- 
26—52 x 18—30 p; pedicels hy aline, leutospores, from Prof. 
deciduous. Trail’s specimens. 
On Thalictrum flavwn, T. minus. Very rare; Kinloch 
Rannoch, Perthshire (Prof. Trail); Kew Gardens. Autumn. 
(Fig. 163.) 
This species has all the marks of a perennial mycelium. The same 
plants are attacked by it year after year; they are somewhat deformed 
and taller, with longer internodes, smaller and paler leaves and narrower 
segments. There is in Fischer a figure of a teleutospore with three cells, 
looking much like that of a Phragmidium. Cf. Puccinia fusca. 
DistRisuTION: Northern and Central Europe, Siberia, 
North America. 
87. Puccinia fusca Wint. 
Aicidium fuscum Pers, in Linn. Syst. Veg. p. 1472 (teleutospores). 
Puceiniz Anemones Pers, Obs. ii. 24. Cooke, Handb. p. 503; Mier. 
Fung. p. 209, pl. 4, f. 65—6. 
P. fusca Wint. Pilze, p. 199. Plowr. Ured’p. 205. Sace. Syll. vii. 669. 
Sydow, Monogr. i. 530. Fischer, Ured. Schweiz, p. 95, f. 73. 
Spermogones. Hypophyllous, mixed with the teleuto-sori, 
blackish. 
Teleutospores. Sori hypophyllous, rarely on the upper 
side, generally spread uniformly over the whole surface of 
the leaves, here and there confluent, small, round, pulverulent, 
dark-brown; spores very much constricted, composed of : two 
almost globose or oblong cells which easily separate, densely 
