ON COM POSIT. K 151 



Teleutos pores. 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—45x18—32^; pedicels Fi 8- ^ ?• Tragopogi. 



r L leleutospores. 



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 secidia 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 tuberculattts ; they can be found at the same time 

 as the fecidia, but are much rarer, or at least less frequently observed. 



Distribution : Europe, Asia Minor. 



26. Puccinia Chondrillae Corcla. 



Mcidium Prenanthis Pers. Syn. p. 208 (non Cooke, Handb. p. 542 ; 



Micr. Fung. p. 198). 

 Puccinia 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 (?). 



uficidiospores. iEcidia 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, 13 — 24//,; peri- 

 dium poorly developed. 



