250 British Uredinee and Ustilaginee. 
found that the sowing of the acidiospores of Zc. pini, both from the 
leaves and also from the young branches, on Senecio viscosus, sylvaticus, 
vernalis, jacobea, and vulgaris, gave rise to the uredospores of the 
Coleosporium. In 1882, I repeated Wolff’s culture on S. vulgaris with 
the zecidiospores from the leaves with success. In 1883, the Rev. Dr. 
Keith sent me from Forres a specimen of 4c. dzv7 on the bark of a 
young fir-branch, the spores from which I used for infecting two plants 
of S. vulgaris, but without success. Too much importance must not 
be attached to this failure, considering the distance from which the 
zecidiospores came. I have had, however, so many failures in in- 
fecting S. vulgaris with the zcidiospores from £c. pint, var. acicola, 
that I think there must be more than one species included under this 
name. My friend M. Max. Cornu informs me that in France he 
has succeeded in producing Cronartium asclepiadeum by sowing the 
zecidiospores of 4c. Dini, var. actcola on Vincetoxicum officinale. As 
neither the Cronartium nor its host-plant occur in Britain, we must 
conclude that the zcidiospores which M. Cornu employed belong to 
a distinct species. 
II. HEMICOLEOSPORIUM. Winter. 
Having uredospores and teleutospores, which occur on the same host- 
plant. 
Coleosporium sonchi. (Pers.) 
Uredospores—Sori rounded, soon pulverulent and scattered, 
orange. Spores in short chains, rounded, oblong, or sub- 
cylindrical, coarsely and densely verrucose, orange-yellow, 
20-35 X 15—20p. 
Teleutospores—Sori at first orange, then red, flat, often confluent, 
forming crusts. Spores cylindrical or cylindrico-clavate, 
generally four-celled, 60-70 X 15-25, sometimes as much 
as 130-140, long. 
Synonyms. 
Schrot., Joc. cét., p. 368. Winter, loc. ct, p. 247. 
Uvedo sonchi-arvensis. Pers., ‘Syn.,” p. 217. 
Uredo compransor, Schlecht. Berk., “Eng. Flor.,” vol. v. 
P. 379 
Uredo sonchi, Pers. Purton, “ Mid]. Flor.,” vol. iti, No. 1547. 
Johnst., ‘‘Flor. Berw.,” vol. i, p. 198.  Grev., “ Flor. Edin.,” 
p. 441. 
