CoUema.] L1CHENES. 211 



18. C. satuminum, Ach. (saturnine CoUema); thallus foliace- 

 ous submembranaceous dark-greenish lead-coloured glaucous 

 and downy beneath, its lobes rounded wavy, apothecia scattered 

 reddish-brown with a thin entire border — Ach. Syn. p. 320. — 

 Lichen satuminns, Sm. in Linn. Tr. v. \,p, 84. Dicks. Cr. 

 Fasc. 2. p. 21. t. 6./. 8. E. Bot. t. 1980. 



Trunks of trees, in mountainous districts ; not unfrequent in Scot- 

 land. — Fructification very scarce. 



19. C. Burgessii, Ach. (Br. Burgess" CoUema); thallus foli- 

 aceous somewhat imbricated glaucous greenish-brown much 

 lobed sinuated curled in the centre as well as in the circumfer- 

 ence downy and somewhat spongy beneath, apothecia copious 

 depressed flatfish brown, their border crisped and foliaceous. — 

 Ach. Syn. p. 320. — Lichen Bnrgessii, Light/. Scot. p. 827. t. 26. 

 E. Bot. t. 300. 



On trees in Scotland, not unfrequent, especially near water ; and in 

 the West Highlands. Cardiganshire, Sir J. E. Smith. 



20. C. tuna/orme, Ach. (sooty CoUema); thallus foliaceous 

 membranaceous somewhat wrinkled black-green with s< ut- 

 tered fuliginous powder, the lobes oblong deeply cut sinuato- 

 laciniated obtuse flexuose and crisped subcrcnate, the apothecia 

 scattered few flattish brown with an entire border. Ach. Syn. 

 p. 322. Winch, Fl. of North, and Durh. p. 93. — Lichen tuna/or- 

 mis, Ach. in Nov. Act. Holm. v. 16. j). 17. t. \.f. 6.—Dichs. Cr. 

 Fasc. 4. p. 25. 



Rod •-.:;, near Wigmere, Hereford, Mr. Dickson. Limestone rocks, 

 about Egleston and Middleton in Teesdale, Durham, Rev. J. Harru 

 man. Near Wycliffin the same county, Mr, Winch. — 1 am unacquainted 

 with this species. 



lM. C. nign'srcns, Ach. (hi irhish or Bat's-wing CoUema); 

 thallus foliaceous membranaceous somewhat solitary orbicular 

 ragged and broadly lobed dark olive-green, apothecia central 

 crowded at length convex reddisn-brown elevated with an en- 

 tire border. — Ach. Syn. p. 321. — Lilian nigr€9C&M, Ilnds. — 

 /;. Hot. t. :U.V— L. Vespertilio, Light/.— Dili, Mute. t. 19./ 20. 



Trunks of trees in damp woods, and shady rock • 



22. C. fldecidum, Ach. (flaccid CoUema)} thallus foliacexms 

 membranaceous smooth dark blackish-green it- lobes ascending 

 rounded plaited entire, apothecia scattered reddish flattish with 

 an entire border. — Ach. Syn. p. 322. — Lichen flaccid**^ Ach. 

 Prodr. — /•;. Hot. t. 1653, — L.rupe8tri* i Linn.JiL — L.mgre*> 

 Ehrh. ( '.'/j't. 



Trees and rocks, chieflj in hilly or mountainous countries. 



•_'••;. ('. oranuldtum, (granulated CoUema)} thallus foliaceous 

 membranaceous granulated on both sides of s blackish-olive 

 colour with tufted cotton) radicles beneath, its lobes crowded 

 rounded plaited crisped and cut, apothecia scattered dark 

 I,, -own. — Lichen granulates, Hud*, I'.. Bot t. 1757, CoUema 



