ACOTYLEDONS. LICHENS. Pcltldctt. 59 



Mab. Trunks of old trees in shady woods, ])ientiful. On old v/idnut 

 trees, at Barncluith, near Cilasgow, Hopk. 



3. S. scrobiculala, thallus suborbiciilar glaucous greyish green 

 verv broad somewhat pitted and having tnealy warts, beneath 

 dovvny tawny with white naked spots, the segments rounded 

 and lobed irregular, apotheeia scattered nearly plane reddish 

 brown their margin somewhat crenate. Jch. Sy?!. Lich. 

 p. VS4. Lichen scrobicutatus. Light/, p. fibO. E.B.t.497. 



Haij. Trunks of trees and on rocks, among moss, Tentland Hills, 



4. S. limhuta, thallus orbicular glaucous brown roundly lobed 

 smooth grev and powdcy at the margin, downy beneath with 

 white hollow spots, apotheeia brown. Ach. Syn. Lich. p. 236. 

 Lichen limbatns, E. B. t. I 104. 



Hab. Rocks in Scotland, Mr. Menzies. At the Hermitage, near Edin- 

 burgh, Sir J. E. Snnlli. On rocks and trees in sliady places, by 

 the'sides of Loch Lomond, and near the Falls of the Clyde, Mr. 

 Turner and Hook. 



5. S. fidiginosa, thMus orbicular dark lurifl grey rough with 

 brown granules, beneath greyish brown with white concave 

 spots, the segments roundly lobed nearly entire, apotheeia 

 scattered dark brown their margin entire. Ach. Syn. Lich. 

 p. 236. Lichen fuliginosjis, E. B. t. 1103. 



Hab. On moist rocks near the Falls of the Clyde, and near Inverary 



and Ballycheulish, Mr. Turner and Hook. 

 Has a very dingy appearance and unpleasant smell. 



6. S. sylnatica, thallus wide rusty brown naked and pitted, brown 

 and dov.-nv beneath with small pale excavations, segments 

 lobed and obtusely cut unequal, apotheeia marginal dark brown. 

 Ach. Syn. Lich. p. 236. Lichen syluutict/s, Light/, p. 848. 

 £. B. t. 2298. 



Hab. Shady woods about the roots of trees, frequent, Llghtf. Falls 

 of the Clyde, Hopk. Woods, Inverary and Ballacheulish, Mr. 

 Turner and Hook. 



Smell very fetid. Apotheeia rare ; never found in Britain, but by 

 Dr. Burgess, as mentioned in E. B. 



21. PELTIDEA, 



Universal receptacle foliaceous, coriaceous, spreading, subadnate, 

 lobed, with woolly veins beneath. Partial reccpt. formed 

 upon the upper side of a produced portion of the under surface 

 of the thallus, orbicular, subobliquely adnate, having a thin 

 elevated margin of tlie substance of the thallus. 



1. P. venosoy thallus greenish ash-colour, white beneath liaving 

 dark brown prominent branched veins, lobes rounded cut 

 somewhat entire, apotheeia marginal plane rounded swelling 

 brown scarcely crenulate at the margin. Ach. Syn. -Lich. 

 p. 237. Lichen vcmosus, Light/ p. 844. E. B. t. 887. 



