196 BRITISH HAWKWEEDS. 
has a blacker, more glandular involucre, and a more hairy upper 
surface of the leaf. ‘The Derry plant grew on warm shingle under 
a southern exposure, a circumstance quite sufficient to account for 
the greater hairiness of the leaf. The Perthshire gatherings were 
denticulate or subentire. Petiole thinly hairy, channelled, with 
midrib inclined to turn red. Stem-leaf petioled, similar to radical, 
denticulate; petiole winged, almost -amplexicaul. Heads few, 
rate in size, on very floccose peduncles, which are usually 
Involucre ovate-obconic in flower, ovoid-conic r 
owering, very floccose, clothed with numerous rather short black 
based hairs some very unequal glandular hairs. Phyllaries 
becoming broader below as they mature, narrow] 
half; stem 1-2 ft. high, floceose and with bulbous-based hairs, 
specially in the upper part, bearing a closely aggregated corymbose 
panicle of : to many heads; peduncles floccose, with black-based 
e 
panicle of neat dark heads, and the somewhat leafy stem, are the 
more obvious distinguishing features of this plant. It was named 
H. cesium Fr. by Dr. Boswe ries’ Epicrisis contains a remark 
under H. cesium on a plant from “« Orney,” sent by Mr, Backhouse, 
