FLORA OF FORFARSHIRE. 
269 
Arthonia, Ach. Arthonia. 
Br. sp . 3. F. 1. 
A. Swartziana , Ach. Swartzian Arthonia. !I. 143. 
On trees Will’s Braes. 
I 
Opegrapha, Ach. Opegrapha. 
Br.sp.andv.il. F. 1. 
O. atra , Pers. Black Opegrapha. H. 145. 
Trees frequent. 
Verrucaria, Pers. Vervucaria. 
Br. sp. and v. 32. F. 6. 
V. biformis, Borr. Deceptive bark Verrucaria. H. 150. 
Trees near Camperdown, rare. 
V. maura , Ach. Black-moor Bock Verrucaria. H. 154. 
On porphyretic rocks banks of the Tay, but most abun- 
dant on the Fife side. Its usual associate, the bright yellow 
Squamaria elegans , is rendered more conspicuous by the 
black hue which this lichen gives to the rocks. 
V. nitida , Schrad., cinerea, Pers., epidermis , Ach., and 
nigrescens, Pers, are enumerated in Don’s Clova list. 
Endocarpon, Hedw. Endocarpon. 
Br. sp. and v. 17. F. 4. 
E. miniatum , Ach. Grey cloudy Endocarpon. H. 156. 
Bridge of Milna-craig above Beeky Linn. Don’slist includes 
this species and the following : — E. miniatum, /3. complicatum , 
Hook., y. aquaticum , Hook., and E. smaragdulum, Ach. 
Pertusaria, Ach. Pertusaria. 
Br. sp. 5. F. 2. 
P. communis , DC. Common Pertusaria. H. 160. 
Den of Glammis, Beeky Linn, and Clova, on trees. 
