172 British Uredinee and Ustilaginea. 
Aicidiospores on Senecio jacobea, May and June. 
Uredospores and teleutospores on Carex arenaria, July to May. 
BIOLOGY.—The life-history of this species was worked out in a 
series of numerous cultures, by which it proved to be distinct not only 
from P. caric’s, but also from P. avenariicola, for the details of which 
see Quart. Four. Micro. Science, vol. xxv., new series, pp. 167 and 
170; and also Linn. Four. Soc. Bot., vol. xxiv. pp. 90-93. It has been 
found by me at North Wootton, Norfolk ; at Skegness, Lincolnshire ; 
and by Professor J. W. H. Trail near Aberdeen. 
Puccinia sylvatica. Schrot. 
cidiospores—Pseudoperidia on round or elongate patches, which 
are often surrounded by a violet margin, crowded, short, with 
white torn edges. Spores polygonal, smooth, orange-yellow, 
14-21 in diameter. : 
Oredospores—Sori small, scattered, dark brown. Spores globose, 
elliptical, or ovate, brown, echinulate, 22-26 X 15—22p. 
Teleutospores—Sori small, round, persistent, pulvinate. Spores 
clavate, apex much thickened, 6-8, rounded, base ‘attenuated, 
somewhat constricted, 35-44 % 12-20. Pedicels persistent, 
about the length of the spores. 
Synonyms. 
Puccinia sylvatica. Schrot., “ Cohn’s Beitrage,” vol. iii. p. 68. 
Winter in Rabh., “ Krypt. Flor.,” vol. i. p. 223. 
Aicidium compositarum, Mart., var. Taraxaci. Grev., “ Flor. 
Edin.,” p. 444. Cooke, ‘“ Hdbk.,” p. 542; ‘Micro. Fungi,” 
4th edit. p. 198, in part. 
Exsiccats. 
Vize, “‘ Micro. Fungi,” 166. 
fEcidiospores on Taraxacum officinale, June and July. 
Uredospores and teleutospores on Carex divulsa, brizoides, 
precox, leporina, remota, rigida, pallescens, panicea, ericetorum, 
pilulifera, flava. 
BIOLOGY.—The admission of this species into the British flora 
requires confirmation, as the teleutospores have not yet been found in 
this country. Mr. Grove also thinks that there are two ecidia on 
