Mr. Hooker's Observations on Andraa. 395 



capsule contains its portion of tlie seeds, besides the columella, 

 which passes through its centre and is inserted into the apo- 

 physis. 



Andraa rtipestris is found in less alpine situations than the last- 

 mentioned species. On dry rocks, which afford nourishment to 

 the various species of GifvophorcE, and where there seems to be 

 scarcely a particle of vegetable mould, this little plant may not 

 unfrequently be met with. 



** foliis uninervibus. 

 3. Andr/ea Rothii. 



A. caule slmpliciusculo, foliis lanceolato-subulatis falcato-se- 

 cundis uninervibus fragilibus ; perichsetialibus oblongis ener- 

 vibus ; margine involuto. 



A. Rothii. Mohr, Fl. Crijpt. Germ. p. 385. t.U.f.T, 8, 9-* 



A. rupestris. Smith, Fl. Brit. 1178. Turn. Muse. Hib. p. 14. 



Lichenastrum alpinum nigricans, foliis capillaceis, reflexis. Dill. 

 Hist. Muse. p. 507. i. 73. 4.0 



Hab. In montibus Arvonia?, Snowdon and Glyder, Dilkniui. 

 Ireland, Mr. D. Turner. On the Yorkshire and Scotch moun- 

 tains, frequent. 



Perennis. ^Estate. 



Caules caespitosi, fragiles, vix unguiculares, erecti, plerumque 

 simplices, sed interdum ramosi, ramis subappressis, simplicius- 

 culis, ubique vestiti foliis dcns^ imbricatis, e basi latiore lan- 

 ceolatii subulatis, falcatis, secundis, rigidis, nervo valido, basi 



* Engl. Bot. t. 2162. 



obsole- 



