AtUciipticcinia. i 5 1 



Synonyms. 



Fnccinia variabilis. Grev., "Scot. Crypt. Flor.," t. 75 ; " Flor. 

 Edin.," p. 431. Johnst, "Flor. Bervv.," vol. ii. p. 196. Berk., 

 "Eng. Flor.," vol. v. p. 365. Cooke, " Hdbk.," p. 500 ; " Micro. 

 Fungi," 4th edit., p. 207, t. 4, figs. 82, 83. 



Vadium taraxaci. Grev., " Flor. Edin.," p. 444. 



yEcidimn grevillei, Gxovq, Jour, of Bot., May, 1886. 



On Taraxacum officinale. 

 July to October. 



Biology. — Mr. H. T. .Soppitt met with this ^cidium at Grassing- 

 ton, in Yorkshire, and found, by applying the a^cidiospores to healthy 

 plants of Taraxacum officinale, the uredospores and teleutospores were 

 produced in about fourteen days. Greville's description of the .^Ecidium 

 is clear : " Spreading over the whole leaf, and generally collected into 

 numerous little clusters, with single ones scattered between them." 

 The yEcidium to Pucci7iia sylvatica, which also occurs on Taraxacum, 

 has its pseudoperidia not scattered but collected into large clusters. 

 In July, 1888, I found the cecidiospores oi P. variabilis at Watlington, 

 near King's Lynn, and successfully repeated Mr. Soppitt's experiment, 



Puccinia pulverulenta. Grev. 



^cidiospores — Pseudoperidia flat, scattered over the whole surface 

 of the leaves. Spores subglobose, finely verrucose, orange- 

 yellow, 16-26^ in diameter. 



Uredospores — Sori scattered or circinating, often confluent, pul- 

 verulent. Spores elliptical or ovate, echinulate, brown, 20-28 



X 15-25/^- 

 Teleutospores — Sori dark brown, often concentric, pulverulent. 



Spores elliptical or oblong, centrally constricted, apex thick- 

 ened, hooded, base generally rounded, smooth, brown, 24-35 

 X 16-20/X. Pedicels colourless, deciduous. 



Synonyms. 



Puccinia epilobii tetragoni (U. C). Winter in Rabh., " Krypt. 

 Flor.," vol. i. p. 214. 



Uredo vagans, var. epilobii D. C, " Flore fran9.," vol. ii. 

 p. 228. 



