178 British Uredinee and Ustilaginee. 
21-35 X 12~20m, intermixed with great numbers of hyaline, 
clavate paraphyses. 
Zeleutospores—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 16-264. Pedicels firm, about the length of 
the spores. 
Synonyms. 
Puctinia magnusiana. Kornicke, “ Hedwigia” (1876), p. 179. ; 
Winter in Rabh., “ Krypt. Flor.,” vol. i. p. 221. 
Fucctinia graminis, Pers., var. arundinis. Cooke, “ Hdbk.,” 
_P. 493.3 “ Micro, Fungi,” 4th edit., p. 202. Berk., “ Eng. Flor.,” 
vol. v. p. 363. Grev., ‘Flor. Edin,” p. 433. Johnst., “ Flor. 
Berw.,” vol. il. p. 195. 
Acidium ranunculacearum, 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. 
Exsiccatt. 
Vize, ‘Micro. Fungi Brit.,” 560. 
fEcidiospores 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. Four. Micro. Science, vol. xxv., new series, pp. 156- 
161. These included the sowing of the promycelial spores on 
barberry, which was without result 3 on various Ranunculi, which was 
also without result, excepting upon R. repens and bulbosa, and the 
converse cultures of the zecidiospores on Phragmites. No result was 
obtained on Rumex conglomeratus, obtusifolium, crispus, hydrola- 
pathum, nor on Rheum. 
