13 



Autoicous ; in opake rufescent or blackish fastigiate tufts. Stems 

 2-1 in. high, rigid, dichotomous, denuded at base. Leaves patent, 

 curved upward at apex or falcato-secund, nerved, from an ovate base, 

 lineal-lanceolate, smooth, entire at margin ; nerve semiterete, prominent 

 at back, vanishing at apex ; lamina gradually narrowed to apex, where 

 it consists of about five rows of cells ; areolation minute and punctiform 

 above, at base minute, subquadrate towards margin, lineal-rectangular 

 in the middle. Perichaetium but slightly exserted, three outer bracts 

 erect, oblong with an acuminate point, nerved, inner convolute, 

 nerveless. Capsule oblong-ovate, black-brown, pale at base. 



Male infl. gemmiform, outer bracts erecto-patent, nerved only at 



apex, inner nerveless ; paraphyses long, thickened. 



Hab. — Mountain rocks, not rare. Fr. 6-7. 



England — Kerris raoor, Penzance (Curnow 1864) ! ! Madron and Mulfra hill, Penzance 

 (Ralfs) \\ Dartmoor {Brent) ! ! Lampford Tor, Great Mis Tor and Lydford, Devon 

 (Holmes) ! ! Micklefell and Mazebeck Scars, Yorkshire (Baker) ! ! Buttermere 

 (Hunt) ! ! Bird's crag, Abergynalwyn (Whitehead) ! ! Capel Curig (Whalley) ! ! 

 earned Llewellyn (Wilson) ! Scotland — Loch Esk (Dr. Hooker 1837) ' Loch Kandor 

 (Croall 1856) ! ! Glen Callater (Hunt) ! ! Mt. Shade, Strachan (Sim) ! ! Ireland— 

 Cromaglown (Lindberg) ! ! 



Although Schimper refers this species to the jfung. rupestris of Linnaeus, 

 the plant in his herbarium is the Scandinavian Andr. obovata, a nerveless 

 species, having very little in common with the plant of Dillenius which 

 should be the true type of the species. Seeing then how much the name 

 rupestris has been misapplied, it would seem to be most convenient to adopt 

 one about which there can be no mistake, and this we find in Weber and 

 Mohr's A . Rothii. The plant varies in size, and is generally of an opake 

 black color, but sometimes it is rufous or olivaceous green, and is generally 

 less rigid than most of our species. 



Var. p. Frigida. (Hueben.) Lindb. 



Plants more robust, flexuose, prostrate in flat tufts, black, rufescent or 



purplish. Leaves broader, more solid, falcato-secund. Bracts of male infl. 



broadly ovate. 



Syn. — yungermannia frigida Hueben. Hepat. Germ. 305, n. 4 (1834). 



Andr. grimsulana Bruch MSS. De Not. Epil. Briol. Ital. 748 {1869). Hobk. Syn. Br. 

 M. 22. 



Andr. Rothii Var. alpina Bruch MSS. 



Andr. Rothii Var. grimsulana Hook. Wils. in Lond. Journ. Bot. 1844, 537- C. Muell. 

 Syn. Muse, i, g. 



Andr. nivalis Var. p. frigida Rabenh. Deutsch. Krypt. Fl. ii, P. 3, 72 {1848). Reinsch 

 Muse. Eur. exsicc. c. fig. 



Andr. rupestris Var. ;8. grimsulana Schimp. Bry. Eur. vi, Mon. 22, t. X, p. Syn. Muse. 

 667 ; et 2 ed. 8ig. 



Andr. Rothii Var. j3. frigida. Lindb. in lit. 

 Hab. — Wet rocks at considerable elevations. 



Ben-mac-dhui, Braemar; on rocks in a stream near the summit on the east side (A. Croall 

 1854) ! ! Beamsley Fell near Ilkley, Yorkshire (Baker I858) ! ! 



