282 Rev. W. A. Leigh ton on the British Umbilicarise. 



7. hijperborea, UofFm. Thallus thin, jagged, and somewhat 

 lobed, a Httle perforated, naked on both sides; upper side green- 

 ish-brown, pustulate ; under side blackish-brown, nearly smooth, 

 slightly pitted. 



"• Lichen superficie subtus lacunata, Linn, Fl. Lapp. n. 453" (fide Walil,). 

 pnllus, " Wulf. in Jacq. Misc. 2. S3, t. .9. f . 3 " (17HI) (fide Dicks.); 



Dicks. Crypt. 2. 23 (secund. specim. in herb. Borrer !). 



e7-osus, Westr. in Act. Stockh. 1793 (fide Ach.). 



hyperboreus, Ach. in Act. Stockh. xv. 89. t. 2. f. 2 (1/94) ; Prodr. 14<). 



Umbilicaria hyperborea, Hoffm. Fl. Germ. 2. 110 (1/95); PI. Lich. 3. 



fasc. 4. t. 71 ; Stenh. in Sched. Crit. fasc. 5 & 6. no. 126; Fries, L. 



Ref. 353; S. V. S. 117; L. S. 126 (fide Nvl.); Tuckerm. Syn. 73; 



Massal. Ricerch. 63. fig. 117; Nyl. N. Class\ 175! 

 Lichen Jacguini, With. Arr. 4. 62? (1796). 

 Umbilicaria papulosa, DC. Fl. Fran9. 3rd ed. 3. 411 (1805). 

 Gyrophora hyperborea, Ach. Meth. 104 (1803); L. Univ. 225; Syn. 66; 



Turn. & Borr. Lich. Brit. 227; Heppe, Fl. Wurzb. 70; Moug. & Nest. 



Stirp. Crypt. Vosges. 1047 ! ; Koerber, Lich. Germ. 95. 

 Gyromium hyperboreum, Wahl. Fl. Lapp. 482 (1812) ; Fl. Ups. 424; Fl. 



Suec. 856. 

 Umbilicaria cenea, ^. hyperborea, Schaer. Spicil. 91. 364 (1823-36) ; Exs. 



1501151! 

 Graphis cenea, y. papulosa, Wallr. Crypt. Germ. 341 (1831). 

 Umbilicaria polyphylla, y. hyperborea, Schajr. Enum. 29 (1850). 



By the Truim, near Dalwhinnie, Inverness-shire? James Brodie 

 of Br die, Esq, 



" Thallus peltate, composed of a single leaf, attached to the 

 stone by a thick, callous, central base, irregularly orbicular, 

 2 inches or more in diameter, fiattish, folded in a most uncertain 

 manner, erose and laciniated at the edges, so as to be torn into 

 many shapeless lobes of variable size, and perforated here and 

 there with equal irregularity : upper surface dusky greenish- 

 brown when moist, much darker and losing the tinge of green, 

 or sometimes almost black, when dry; always naked, and all 

 over rugged, with irregular pustular elevations of the cuticle, 

 which has the appearance of having burst, leaving smooth black 

 interstices, varying much in width and figure between the ele- 

 vations : under surface deep blackish-brown, smooth and naked, 

 irregularly pitted all over, and thence appearing obsoletely reti- 

 culated ; sometimes, in very old specimens, slightly granulated, 

 and pierced here and there with perforations of the inferior coat 

 of the thallus : substance coriaceous, thin, flexible when moist, 

 and somewhat so, though brittle, even when dry. Tric(2 sessile, 

 attached by the centre, irregularly orbicular, elliptical, or va- 

 riously distorted and angular, flat, or more generally more or 

 less convex ; their margin nearly entire ; gyri of the disk often 

 parallel and straight, but most frequently variously twisted and 

 disposed in several groups, and in this case the common margin 



