Var. . Gracilis. SCHIMP. 



Stems slender, branched, rufescent ; surculi straight, elongated ; leaves 

 more distant, suberect, broadly oblongo-lanceolate ; perichaetium narrow, 

 cylindric. 



SYN. A. petrophila Var. . gracilis SCHIMP. B. E. vi, Mon. 13, t. II, ; Syn. Muse. 661 ; et 

 2 ed. 813. 



HAB. Elevated mountain districts. 



Stye-head pass, Borrowdale (Hunt 1871) ! ! Cader Idris (Pearson 1874) ! ! Loch.na-Gar, 

 Braemar (Sim 1876) ! ! Ben Nevis, near summit (George 1879) ! ! 



Two forms of this variety occur, one rufous brown, to which the 

 Braemar plant belongs, the other, more slender and of a beautiful rosy 

 purple tint, represented by Mr. George's specimens. The first is identical 

 with Stockholm specimens from Lindberg, and readily distinguished by its. 

 straight branches and suberect leaves. 



Var. >;. Alpestris. THEDEN. 



In densely cushioned black-brown tufts. Stems very slender, much 

 branched. Leaves small, crowded, closely imbricated when dry, obtuse, 

 laxly areolate, less distinctly papillose. 



SYN. And. petrophila Var. alpcstris THED. in Nya Bot. Not. 1849, p. 79, fig. 45-47. HARTM. 

 Skand. Fl. 6 ed. 437. ZETTERST. Mon. Andr. Scand. 43. 



Andr. alpina DE NOT. Syll. Muse. p.p. 



Andr. alpcstris SCHIMP. Bry. Eur. vi, Mon. 16, T. IV., Syn. Muse. Eur. 662 ; et 2 ed. 814. 

 DE NOT. Epil. Briol. Ital. 747. HARTM. Skand. Fl. 7 ed. HOBK. Syn. Br. M. 21. 



HAB. Wet rocks on the higher mountains of Scotland ; rare. 



Glen Callater, Braemar (Croall 1853) ! ! Morone, Braemar (Hunt 1871) ! ! Ben Challum, 

 Perthshire (McKinlay 1866) ! ! Uam Mhor, Perthshire (McKinlay 1865) ! 



This variety appears to stand midway between A. petrophila and 

 A . obovata, but agrees entirely with the first in the form and areolation of the 

 leaf, though differing remarkably in aspect, by its very slender, branching 

 stems, and smaller, closely imbricated leaves. None of our specimens come 

 quite up to the standard of the Scandinavian plant, being thicker and more 

 stunted and thus as it were intermediate between ordinary A . petrophila and 

 the type of the variety ; this is especially the case with the Perthshire 

 specimens. 



Var. . Sparsifolia. (ZETT.) LINDB. 



In small, lax tufts; olivaceous or rufescent; stems very slender and 

 fragile, fiexuose, with few branches. Leaves small, distant, spreading, the 

 uppermost secund or subfalcate, lanceolate, gradually acuminate, acute, less 

 distinctly papillose. 



SYN. Andr. sparsifolia ZETTERST. Mon. Andr. Scand. 32. SCHIMP. Synops. 665 ; et 2 ed. 817. 

 DE NOT. Epil. Briol. ital. 746. HARTM. Sk. Fl. 



HAB. Near the summits of the higher mountains. Very rare. 

 Summit of Ben More, Perthshire (George 1875). 



