yEcidiinn. 265 



Synony»i. 

 yEcidium convallarice. Schum., " Enuni. Plant. Sasll.," vol. ii. 

 p. 224. Winter, loc. at, p. 259. 



On Convallaria majalis. Mr. Birks. 

 May to July. 



.^cidium barbarese. I). C. 



Pseudoperidia amphigenous on rubescent spots, in irregular 

 clusters, large, cup-shaped, rather flat, edges whitish, torn or 

 crenulate. Spores orange, subglobose, finely verrucose, 15- 

 25(a in diameter. 



Synonym. 

 jEcidium barbarece. D. C, "Flore fran^.," vol. ii. p. 244. 

 Duby, "Bot. Gall," vol. ii. p. 905. Cooke, " Grevillea," vol. x. 

 p. 115. Winter, loc. cit, p. 267. 



On Barbarea prcBcox. Plymouth ; Mr. Varenne. 



Biology. — Sometimes the pseudoperidia occupy the whole leaf- 

 surface, causing considerable distortion. 



.fficidium clematidis. D. C. 



Pseudoperidia in roundish clusters on the leaves, often upon 

 swellings on the pedicels and young shoots, causing consider- 

 able distortion, shortly cylindrical or flat, with white torn 

 edges. Spores subglobose, minutely verrucose, yellow, 20-2 7/A 

 in diameter. 



Synonym. 

 Winter, loc. cit., p. 270. 

 ^cidiian ranuncnlacearnm, var. clematidis. D. C, " Flore 



fran^.," vok ii. p. 243. Cooke, " Hdbk.," p. 539. 



On Clematis vitalba. 

 May to July. 



Biology. — R^thay states that this is connected with Melampsora 

 populina, Tul. ("Uber auto, und heteroecische Uredincen," Verhand. 

 zool. bot. GeselL, bd. xxxi. p. 13. Wein : 1881.) I have tried this culture 



