326 . LICHENACEl. [eyRorHoRA. 
Forfarshire; Craig Coinnoch, Lochnagar, near Invercauld, Glen Callater 
and Ben Macdhui, Braemar, Aberdeenshire; Glen Nevis and Ben Nevis, 
Inverness-shire, , 
Form 1. fimbriata Mudd, Man. (1860) p. 118.—Thallus sparingly 
fibrillose at the margins and on the under surface ; otherwise as 
above.—Cromb. Grevillea, xv. p. 79.— Umbilicaria proboscidea form 
JSmbriata Leight. Lich. Fl. p. 160, ed. 3, p.147. Gyrophora deusta 
B. fonbriata Turn. & Borr. Lich. Br. (1839) p. 222. 
Seems always to grow associated with the type, of which it is probably 
to be regarded only as a state, since at times similar conditions occur in 
the variety. The fibrille are usually very few, though occasionaily 
they are more numerous, 
Hab. On rocks and stone walls in upland and subalpine districts.— 
Distr. Local and rare in N. Wales and N. England; more common 
among the Grampians, Scotland.—B. M.: Snowdon, Carnarvonshire ; 
Swinhope Fell, Durham. Ben Lawers, Perthshire ; Clova, Forfarshire ; 
Craig Coinnoch, and Cairngorm, Braemar, Aberdeenshire. 
Form 2. exasperata Ach. Meth. (1803) p. 105.—Thallus deeply 
plicato-corrugate, the plice crowded, wndulate, and subreticulate.— 
Cromb. Grevillea, xv. p. 79.— Umbilicaria proboscidea var. exasperata 
Cromb. Lich. Brit. p. 40. Gyrophora deusta y. corrugata (Hoffm.), 
Turn. & Borr. Lich. Br. p. 222. Umbilicaria variu 0. deusia e. 
corrugata Leight. Ann. Mag. Nat. Hist. ser. 2, xviii. p. 290. Gyro- 
phora proboscidea c. corrugata Mudd, Man. p. 118. Umbilicaria 
proboscidea {. corrugata Leight. Lich. Fl. p. 160, ed. 3, p. 148.— 
The trivial name corrugata Hoffm. (Pl. Lich. (1794) p. 65) has 
priority ; but I have retained that of Acharius in order to prevent 
confusion with G. corrugata (Ach.) Nyl. 
Differs in the very prominent reticulate ruge of the upper surface, 
which are nearly a line in height, and which “ look like a series of erect 
curled squamules” sometimes developing into small lobules. These 
occur chiefly towards the centre of the thallus (except in smaller plants), 
beyond which it is usually very rugose, “almost papillose.” To this 
latter state belongs var. mesenteriformis (non Wulf. nec Scher.), Turn. 
& Borr. 2. ¢., Leight. di. cc, Mudd, Man. p. 118. The few British specimens 
are sparingly fertile. 
Hab. On rocks and boulders in alpine places.—Distr. Very scarce 
among the N. Scottish Grampians—B. M.: Ben-naboord, Braemar, 
Aberdeenshire. 
Var. 6. deplicans Fr. fil. Lich. Scand. i. (1871) p. 163.—Thallus 
brown-fuliginous, searcely greyish in the eentre, continuously rugose 
or rugulose on the upper surface.—Cromb. Journ. Bot. 1882, p. 273. 
—Umbilicaria proboscidea var. deplicans Nyl. Lich. Scand. (1861) 
p. 116. 
‘Well distinguished from the type by the absence of reticulate plice. 
In the few British specimens the under surface and the margins are more 
or less fibrillose, so that in this respect they are analogous to form jim- 
