1 7 8 British Urcdine^F and Ustilaginc(^. 



21-35 X 12-20/A, intermixed witli great numbers of hyaline, 

 clavate paraphyses. 

 Teleiitospores — Sori black, persistent, very numerous, small, 

 scattered, elliptical or linear, on the stems and sheaths con- 

 fluent into very long, black lines. Spores oblong or clavate, 

 base attenuated, apex much thickened, rounded and darker, 

 truncate or sometimes conical, constriction slight, chestnut- 

 brown, 30-55 X 16-26/A. Pedicels firm, about the length of 

 the spores. 



Synonyms. 



Piucinia magmisiana. Kornicke, " Hedwigia " (1876), p. 179. 

 Winter in Rabh., " Krypt. Flor.," vol. i. p. 221. 



Pticcinia gromwis, Pers., var. arimdinis. Cooke, " Hdbk.," 

 p. 493 ; " Micro. Fungi," 4th edit, p. 202. Berk., " Eng. Flor.," 

 vol. v. p. 363. Grev., " Flor. Edin," p. 433. Johnst., " Flor. 

 Berw.," vol. ii. p. 195. 



j^cidmm ranunculacearuni, D. C. Cooke, " Hdbk.," p. 539 ; 

 " Micro. Fungi," 4th edit., p. 196, in part. Berk., " Eng. Flor.," 

 vol. V. p. 370. Grev., " Flor. Edin.," p. 446. Johnst., " Flor. 

 Berw.," vol. ii. p. 206, in part. 



Exsiccati. 

 Vize, "Micro. Fungi Brit," 560. 



^cidiospores on Ranunculus repens and bulbosa, April to 

 June. 



Uredospores and teleutospores on Phragmites communis, June 



to April, 



Biology.— The life-history of this fungus was worked out by a 

 long series of cultures, more than fifty in number ; for the details of 

 which, see Quar. Jour. Micro. Science, vol. xxv., new series, pp. 156- 

 161. These included the sowing of the promycelial spores on 

 barberry, which was without result ; on various Ranunculi, which was 

 also without result, excepting upon R. repens and bulbosa, and the 

 converse cultures of the fecidiospores on Phragmites. No result was 

 obtained on Rumex conglomeratus, obiusifolium, crispus, hydrola- 

 pathinn, nor on Rheum. 



