ON COMPOSITA 151 
Teleutospores. Sori amphigenous, without manifest spots, 
scattered, occasionally aggregated, mi- 
nute, punctiform, long covered by the 
epidermis, at length pulverulent, dark- 
brown; spores ellipsoid, rounded at 
each end, not thickened above, gently 
constricted, tuberculate, chestnut- 
brown, 26—45 x 18—32; pedicels ae oa 
hyaline, short. 
On Tragopogon pratensis. Not uncommon. April—Sep- 
tember. (Fig. 103.) 
The mycelium arising from the infection of young plants by the basi- 
diospores permeates the whole of the host, so that ecidia are produced on 
every part—stems, leaves, bracts, and receptacles—and the infected plants 
are noticeable for their paler colour and distorted form. It is believed to 
hibernate also in the upper part of the root-stock. The mycelium of the 
teleuto-sori is, on the contrary, strictly localised. Uredospores are not 
produced in separate sori, but a few can be found intermixed with the 
teleutospores, as well as a few mesospores ; the former can be distinguished 
from the latter by being delicately aculeate, not tuberculate. The 
teleutospores of this species are grossly and distinctly warted, reminding 
one of those of Uromyces tuberculatus; they can be found at the same time 
as the wcidia, but are much rarer, or at least less frequently observed. 
DIsTRIBUTION: Europe, Asia Minor. 
26. Puccinia Chondrille Corda. 
Ascidium Prenanthis Pers. Syn. p. 208 (non Cooke, Handb. p. 542 ; 
Micr. Fung. p. 198). 
Puceinia Chondrillae Corda, Icones, iv. 15. Fischer, Ured. Schweiz, 
p. 200, f. 156. 
P. Prenanthis Auct. p.p.; Plowr. Ured. p. 148. Sydow, Monogr. i. 
106. McAlpine, Rusts of Australia, p. 162 (?). 
Ajcidiospores. Aucidia hypophyllous or on the petioles, 
rarely a few on the upper surface, seated on large yellow and 
purple spots, in clusters as much as 6—8 mm. broad, at first 
hemispherical, opening by a pore, then flattened, whitish or 
yellow, sometimes with a purplish tinge; spores globose to 
ellipsoid, delicately verruculose, pallid-orange, 183—24y; peri- 
dium poorly developed. 
