ON THE HIERACIA OF NORTH YORKSHIRE. 499 
varying in shape from oblong to linear-lanceolate, rigid or flac- 
cid, smooth or hairy, paler and prominently veined below ; upper 
amplexicaul, lower narrowed to a rounded base. Peduncles 
erecto-patent, like the broad blunt-based imvolucres slightly 
stellately downy. Heads of flowers larger but not so numerous 
as in umbellatum. Phyllaries dark green, blackish when dried, 
sometimes slightly hairy or setose on the back, closely adpressed, 
all blunt. Ligules glabrous. Styles yellowish. 
On the banks of Langdonbeck, near the bridge of the Mid- 
dleton and Alston Road; on the Durham side of the Tees, on 
rocks above and below the High Force, and in the wood below 
the Inn; on the Yorkshire bank in considerable abundance , 
about Lower Cronkley-bridge and Wince-bridge; in Cleveland, 
on the edge of Botton-head, above Ingleby Greenhow. Range of 
elevation, 300 to 500 feet.—The variety angustatum of Fries ap- 
proaches umbellatum on the one hand, and his dilatatum, the next 
species, in an opposite direction. 
12. H. corymbosum, Auct. Angl.—H. rigidum, Symb. fide 
Fries.—Stem two to three feet high, densely leafy, nearly or quite 
glabrous, rigid or flexuose, paniculato-corymbose above. Leaves 
ovate-lanceolate, narrowed gradually towards the base, toothed 
about the middle, glaucous and prominently veined below, upper 
amplexicaul. Peduncles erecto-patent, usually rigid, scaly, like 
the broadly ovate-based involucres thinly covered with white 
stellate down and a few black hairs and setze. Heads of flowers 
much more numerous, but smaller, than in crocatum. Phyllaries 
dark green, blackish when dried ; outer loose, acute, inner atte- 
nuated upwards, and considerably narrower than in crocatum. 
Ligules glabrous. Styles yellowish. 
With the preceding, in Teesdale, at Langdon-bridge, about the 
High Force, below Wince-bridge, and in other stations. In the 
valley of Gillig, on Kirby-hill, near Ravensworth, and in Swale- 
dale Proper, in a wood near Downholme. Range of elevation, from 
200 to 400 yards. Much more like crocatum than tridentatum. 
13. H. boreale, Fries, Nov., p. 261.—Stem one to three feet 
high, densely leafy, usually glabrous, sometimes hairy, subcorym- 
bose above. Leaves variable in number and shape, sessile, ovate- 
lanceolate, narrowed gradually to the base; upper broader below 
in proportion, sometimes slightly amplexicaul, more or less 
toothed about the middle, paler and somewhat glabrous on the 
under side. Peduncles rigid, erecto-patent, scaly, like the ovate- 
