ON COMPOSITA 155 
29. Puccinia Sonchi Rob. 
Headium Sonchi Johnst.; Plowr. Ured. p. 266. 
Puccinia Sonchi Rob. in Desm. Ann. Sci. Nat. ser. 3, xi. 274. Grove, 
Sci. Gossip, 1885, p. 9, f. 6—9. Plowr. Ured. p. 196. Sauce. Syll. 
vii. 638. Sydow, Monogy, i. 154, 
[Spermogones. Obtained artificially on S. arvensis by Tranz- 
schel. | 
Uredospores. Sori generally hypophyllous, on the stem 
collected in small oblong patches 4—5 mm. long, on yellowish 
spots, scattered or gregarious, minute, at first covered by the 
epidermis which is raised over them in a hemispherical vesicle, 
then pierced at the top but never widely open, yellowish, 
surrounded by a dark-brown line of paraphyses; spores more or 
less oblong or obovate, densely verrucose, with a very thick 
epispore, contents oily, yellowish, 2438 x 15—21 pu. 
Fig. 107. P. Sonchi. a, the line of dark-brown paraphyses surrounding the 
uredo-sori; b, a pale-brown paraphysis; c, a uredospore; all on S. 
oleraceus. - x 600. 
[Teleutospores. Sori hypophyllous, rarely on the stems, on 
irregular brownish spots, more compact, rounded-pulvinate, 
scattered or aggregated, confluent when on the stem, covered 
by the epidermis, black; spores ovate or oblong, rounded or 
truncate (rarely attenuated) above, thickened (8—8,), con- 
stricted, rounded below, smooth, pale-brown, 30—60 x 20—30 4p ; 
pedicels somewhat long, brownish, persistent; mesospores ovate, 
