ON RANUNCULUS 107 



formed on other leaves on a localised mycelium, cause no deformation and 

 are not conspicuous ; in them are a few secondary uredospores. The 

 teleutospores have unusually coarse warts, mostly towards the apex, or are 

 sometimes nearly or partially smooth. Bubak records (Centralbl. f. 

 Bakter. 2. xvi. 158) that in many trials in three years he could never get 

 the teleutospores to germinate, and could not artificially produce infection 

 in Alchemilla, though Klebahn (Zeitschr. f. Pfianzenkr. 1907) did so 

 readily with the uredospores. This species can be gathered at considerable 

 altitudes in Wales and Scotland (and as high as 7200 ft. in Switzerland). 



Distribution: Europe, Asia Minor, Greenland. 



20. Uromyces FicariaB Lev. 



Credo Ficariae Schum. PI. Sail. ii. 232. 



Uromyces Ficariae Lev. Ann. Sci. Nat. 3. viii. 390. Cooke, Handb. 



p. 518 ; Micr. Fung. p. 212, pi. 7, f. 156—7. Plowr. Ured. p. 140. 



Sacc. Syll. vii. 568. Sydow, Monogr. ii. 208. Fischer, Ured. 



Schweiz, p. 13, f. 12. 



Teleutospores. Sori amphigenous or on the petioles, about 

 ^ mm. diam., rounded, frequently col- 

 lected into dense orbicular or elongated 

 clusters, on pale-yellow spots, especially 

 on the petioles where they cause not- 

 able distortion, soon naked, pulverulent, 

 chocolate-brown ; spores more or less 

 obovate, often irregular, not thickened 

 above, but with a conical hyaline papilla, Fig- 60. U. Ficariae. 

 smooth, pale-brown, 22 — 38 x 18 — 26 fx ; Ficaria^ ™* 



pedicels hyaline, deciduous ; a few sub- 

 globose, pale-brownish, faintly echinulate uredospores, each 

 with three germ-pores, are occasionally found intermixed, but 

 arc usually abortive. 



On Ranunculus Ficaria. March to early June. Very 

 common. (Fig. 60; see also Fig. 79.) 



The eecidium on the same host belongs to the life-cycle of Uromyces 

 Poae, and is considered to have no connection with the Uromyces on 

 R. Ficaria, though it may be found on the same leaf. Klebahn proved 

 that the teleutospores reproduce themselves. But there is a curious 

 conclusion arrived at by Tranzschel, as the result of his experiments 



