ACOTYLEDONS. — LICHENS. Gijrophora. 41 



31. L. dec'/piens, crust sublmbricated, lobes distant subpeltate 

 roundish flesh-coloured and red brown whitish beneath, apothe- 

 cia in their border convex and subglobose black, margin obso- 

 lete. .■Jch. Syn. Lick. p. 52. Lichen decipiens, E. B.t. 1501. 



Hab. Upon the earth in heathy places^ Scotland, Dickson. 



32. . L. microphylla, thalhis slightly imbricated fragmentary 

 greyish green on a dense black fibrous cushion, its segments 

 somewhat linear lobed crenate and granular at the margin, 

 apothecia scattered tawny paler at the margin at length con- 

 vex brown obliterating the margin. Liclmi microphylluSj 

 E.B. ^2128. Lecidea microphylla^ var. triptophylla, Ach. 

 Syn. Lick. p. 53. 



Hab. Trees by Loch Katarine, Mr. Turner and Hook. At Inveraiy 

 and in Glen Ach-na-shilloch, Ross-shire, Mr. Borrer and Hook. 



5. CALICIUM. 



Universal receptacle crustaceous, spreading, plane, adnate, uni- 

 form. Partial recep/. cup-shaped, sessile, or stipitate, cartila- 

 ginous, containing a compact pulverulent mass, plane or con- 

 vex above, forming a naked disk. 



I. C. sphcerocephalum, crust very thin greyish smooth, apothe- 

 cia subglobose, the disk dark brown, the margin greyish, 

 stipes filiform black. Ack. Syn. Lick. p. 57. Lichen sphce- 

 roc, E.B. /.414. Mucor sphcprocephalus and Uchejwides, 

 Light/, p. 1071. 



Hab. On the bark of old trees and pales. 



6. GYROPHORA. 

 Universal receptacle foliaceous, coriaceo-cartilaginous, peltate, 

 of one piece (or by luxuriance many-leaved), free beneath. 

 Partial recept. subscutelliform, sessile, and adnate, covered 

 by a cartilaginous (black) membrane, \\ie,disk warted or 

 marked with circles, variously plaited and contorted and mar- 

 gined. 



1. G. glabra, thallus smoothish blackish green beneath smooth 

 black and naked, apothecia at length convex rough and plaited. 

 Ach. Syn. Lich. p.Q3. 



^. polyphylla, thallus of many leaves or lobes variously folded 

 blackish green quite black beneath on each side naked and 

 smoothish. Lichen polyphyllus, Lighlf. p. 863. E. B. 

 t. 1282. 



Hab. Rocks on the Highland mountains, frequent, Light/. 



2. G. prohvscidea, thallus membranaceous with elevated reticu- 

 lations at length of a smoky ash-colour rough smoother paler 

 and subfibrillose beneath, apothecia turbinate at length convex 

 variously plaited. yJch. Syn. Lich. p. 64. £. ^. /. 2484. 

 Lichen dens ius, Light/, p. 861. 



