282 \{c\. W. A. Lcighton on the Britisth Unibilicari?c. 



7. hifju'rhort'd, lIolFm. Tlialhis tliiii, jairgtil, and sonicwluit 

 It)biil, a little pntoratid, naked on both sides; u|)|)er side green- 

 ish-brown, j)iistnlate ; under side blackish-brown, nearly smooth, 

 slightly pitted. 



" Liefu-n sitperficie suhtuji lacuniilu, Linn. Fl. Lii]))). n. I.Vl " (H(k' Walil.). 

 piilliis, "'Wiilf. in Jacq. Misc. 2. S;j. t. !^. f. .i" (l/Sl) (ll.le Dicks.); 



Dicks. Civpt. 'J. li.i (secinul. spccini. in herb. Horrcr!). 



enisHS, \Vcstr. in .\ct. Stockli. \'J\)A (tide Ach.). 



/iy/)fr'joreus, Acli. in Act. Stockh. xv. S!^ t. 2. f. 1? (l/.'M) ; Pio.h-. I Hi. 



l'ml)Hic(irin hypirborea, Hotfni. V\. Gciin. 2. 1 10 ( I7!'.'>) ; PI. Lich. .'{. 



fiisc. J. t. 71 ; !>tcnli. in Schcd. Crit. fasc. 5 & (J. no. \'2(\; Fries, L. 



Kef. ;^5:i; S. V. S. 117; L. S. V2G (fide Nyl.); Tuckcrm. Svn. T-i; 



Massal. Ricerch. (5;^. fig. 117; Nvl- N. Class. 175! 

 JAchen Jacquini, With. Arr. 4. (12? {\TM). 

 I'mhilicaria papilhsa, DC. Fl. Fran^. .'ird cd. 3. 411 (1805). 

 Gyrojilioru hypirboreu, Ach. Mcth. KM (1S(W); L. Univ. 22r) ; Syn. tifl ; 



Turn. & l?orr. Lich. Brit. 227 ; Ileppe, Fl. Wurzl). 7" ; Mong. & Nest. 



Stirp. Crypt. Vosges. 1047 !; Koorber, Lich. Germ. !<5. 

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



Snec. 856. 

 Umbilicaria cenea, ^. hyperborea, Schser. Si)icil. IH. 364 (1823-36) ; Kxs. 



150! 151! 

 (Iraphis (cnea, y. papulosa, Wallr. Crypt. Germ. .S41 (1831). 

 Vmbilicaria polyphylla, y. hyperborea, Sclia;r. Enum. 2\) (1850). 



IJy the Truim, near Dalwbinnic, Inverness-shire? James Brodie 

 of Bi-odic, Esq. 



" T/ial/us peltate, composed of a single leaf, attached to the 

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

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

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

 many sha])eless lobes of variable size, and j)erforated here and 

 there with equal irregularity ; ujtper 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 aj)|)earance of having burst, leaving smooth black 

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

 vations : under surface deej) blackisli-brown, smooth and nak(;d, 

 irregularly pitted all over, and thence a])pcaring obsoletely reti- 

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

 and pierced here and tiiere with perforations of the inferior coat 

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

 and somewhat so, though brittle, even when dry. Trica sessile, 

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

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

 less convex ; their maryin nearly entire; fjyri of the disk often 

 ])arallil and straight, but most fre(piently variously twisted and 

 disj)o.sed in several grouj)s, and in this case the common margin 



