FLORA OF FORFARSHIRE. 
277 
Old birch trees, Glen Dole. Craigs of Lundie ; Hill of 
Turin ; Reeky Linn. North face of the Rock of St Skae, 
near Usan, Mr A. Croall. No ft. 
S. scrobiculata , Ach. Pitted Sticta. H. 206. 
Clova ; Reeky Linn ; Lundie Craigs ; Sands of Barrie, 
sterile. In the latter station it grows on the bare sand, in 
the others on rocks and trees. 
S. limbata, Ach. Mealy-bordered Sticta. II. 206. 
Clova, Mr G. Don. 
S. sylvatica, Ach. Pitted wood Sticta. H. 207. 
On rocks, Reeky Linn, sterile. 
Collema, Ach. Collema. 
Br. sp. and v. 33. F. 9. 
C. nigrescens , Ach. Bat’s- wing Collema. H. 211. 
Reeky Linn ; Den of Glammis ; Glen Dole, &c., mostly 
on rocks. 
C. flaccidum, Ach. Flaccid Collema. H. 211. 
Reeky Linn. Clova, Mr G. Don. 
C. lace rum, Ach. Jagged Collema. H. 213. 
Among mosses in shady places frequent, as the Dens of 
Glammis, Airlie, Glen Dole, &c., in ft. at Reeky Linn. 
C. subtile, Ach. Fine-spun Collema. H. 213. 
Reeky Linn. 
C. tenuissimum , Ach. Fine-cut Collema. 
C. spongiosum , Ach. Spongy Collema. H. 213. 
Both on the sands of Barrie. 
Mr G. Don enumerates the following species : C. satur- 
ninum, Ach., C. crispum , Borr., and C. fasciculare, Ach., 
and probably many others will be added by future observation. 
