176 HISTORY OF BRITISH MOSSES. 



On rocks, damp walls, and trunks of trees. Fr. Spring. 

 This species has a rigid habit, and dark colour, with obtuse 

 leaves strongly nerved. 



tt Capsule exserted. 



2. Orthotrichum anomalum, Hedw. {Anomalous Bris- 

 tle IIoss.) Stems erect; leaves ovato-lanceolate, erecto- 

 patent, straight when dry ; teeth eight, geminate ; calyptra 

 sKghtly hairy. — E^ig. FL 7;. 53 ; Mull. Spi. ^jt. 1. 7;. 694. 



On rocks and walls. Fr. Spring. This is a handsomer 

 species than the preceding, w^hich it somewhat resembles in 

 habit, and with which it has been confounded by some 

 authors. It is usually found in fine condition on the trap- 

 rock of Arthur's Seat, especially such as project a little way 

 beyond their grassy covering. 



3. Orthotrichum Drummondii, Hook. {Mr. Di-um- 

 mond's Bristle Moss.) Stems creeping ; leaves narrow, lan- 

 ceolate, crisped when dry; capsule elongato-clavate, deeply 

 furrowed; calyptra very hairy. — Eng. Fl.p.h^; Mull. Si/n. 

 pt. I. p. 712. 



Stems of Birches and other trees, in the west Higldands 

 of Scotland; near Belfast, and in the woods of Killarney, 

 Ireland. It is probably not uncommon in mountain districts 

 of the north of England, as Mr. Spruce, in his account of 



