confined to Scandinavia. I agree with Lindberg in regarding A. Thedenii 

 ScHiMP., as a var. of A. Havtmani, and A. sparsifoUa Zetterst., as a var. of 

 A . petropMla, very near to alpestris, 



Clavis to the Species. 



Leaves nerveless. 



Leaves ovato-lanceolate, papillose, entire 



petrofhila. 



Leaves obovate-spathulate, apiculate, smooth, serrate at basal margin. 



alpina. 

 Leaves nerved. 



Leaves oblong at base, subulate, smooth ; nerve toward apex without any 

 lamina. 



crassinervis. 



Leaves ovate at base, lanceolate, smooth ; nerve flattened, the lamina narrowed 

 but distinct to apex. 



Rothii. 



Leaves oblongo-lanceolate, papillose, laxly areolate ; nerve narrow, the lamina 

 broad and distinct to apex. 



nivalis. 



Sect. I. EUANDREMA. Lindb. 



Leaves and perichsetial bracts different in form, the latter erect and 

 convolute, nerveless, or scarcely nerved. 



* Leaves nerveless. 



I. A. PETROPHILA. Ehrh. 



Autoicous ; in small, fragile, olive green or fuscous tufts. Leaves 

 nerveless, crowded, from an erect base, divergent, sometimes secund, 

 entire, papillose at back, ovate or ovato-lanceolate, the apex muticous 

 and somewhat obliquate ; areolation incrassate, punctiform and 

 orbicular at apex, sinuoso-rectangular at base. Perichsetial bracts 

 large, convolute. {T. Ia.) 



Syn. — yungermannia alpina L. Sp. PI. 1135, 11.22 (1753) ; et 2 ed. ii, i6oi (1763), p.p. et herb. 



Web. Spic. Fl. Gott. I52,excl. syn. (1778). Retz. F1. Scand. Prod. 22i,excl. syn. (1779). 



Roth Fl. Germ, i, 485 (1788). Fl. Dan. t. 1002, f. i (1790). Liljebl. Svensk Fl. 323 



(1792). ScHRAD. Spic. Fl. Germ, 76 (1794). Hueb. Hepat. Germ. 301, excl. syn. pi. 



(1834)- 

 Andr. petrophila Ehrh. in Hann. Mag, 1784, 9 Stiick, 140; Beitr. i, 192 (1787), excl, syn. 



et Dec. Crypt, n. 67 {1786). Hoffm. Deutsch. Fl. ii, 80 (1796). Sturm Deutsch. Fl. 



fasc. 2, 3, f. b. C. D. (1799). Theden. in Nya Bot. Not. 1849, p. 78, f. 37-44. Hartm. 



Skand, Fl. 6 ed. 437 (1854). Zetterst. Mon, Andr. Scand. 42 (1855). Schimp. Bry. 



Eur. vi, Mon. 13, T. i {1855) ; Syn. Muse, Eur, 660 (i860) et 2 ed. 812 (1876). Sull. 



Moss, Unit, St, 13 (1856), Hook, fil. Fl, Tasm. ii, 161 {i860) ; Handb. N. Zeal, Fl. 



400 (1867), Berk, Handb, Br, M, 309 (1863), Mitt, Jour, Lin, Soc. xii, Bot, 628 



(1869), MiLDE Bry, Siles. 256 (1869), De Not, Epil, Briol, Ital. 746 (1869). Hobk. 



Syn. Br. M. 21 (1873), 

 A. petrophila, a. alpina et ;8. rupestris Wallroth Fl. Crypt. Germ. 92, excl. syn, plur. 



{1831). 



