2 ANDREA. 



HAD. Ireland, Wales, and Scotland, upon rocks, but not 

 common. 



This species varies in the looseness or compactness of 

 growth, in the stems as well as in the leaves, and somewhat 

 in the colour of the latter, which we have now and then 

 seen in shady situations of a yellowish brown. 



2. A. rupestris; stems branched, leaves ovate, gradually acumi- 



nated, the upper ones falcate. (TAB. VIII.) 



A. rupestris. Hedw. Sp. Muse. p. 47. t. J. f. 2. Engl Bot. t. 1277- 

 (not Fl. Brit.) Hook, in Linn. Trans, v. 10. p. 391. t. 31. f. 2. Junger- 

 mannia rupestris. Linn. 



HAB. On rocky mountains throughout Great Britain. 

 The accurate Dr. Mohr was the first, we, believe, satis- 

 factorily to distinguish this species, which in size comes 

 nearest to A. Rolhii, but in the structure of the leaves, and 

 especially in the absence of a nerve, to A. alpina. From 

 this the form of the leaves, with their direction, and the 

 diminutive size of the whole plant, keep it sufficiently 

 apart. 



** Leaves furnished with a nerve. 



3. A. Rothii; stems almost simple, leaves lanceolato-subulate, 



falcato-secund, fragile ; perichaetial ones oblong, nerve- 

 less, their margins involute. (TAB. VIII.) 



A. Rothii. Mohr FL Crypt. Germ. t. Ik/. 7-9. Engl. Bot. t. 2162. 

 Hook, in Linn. Trans, v. 10. p. 393. t. 31. /. 3. Moug. et Nestl. n. 116. 

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

 Muse. t. 83. / 40. 



HAB. Alpine rocks, common. 



4. A. nivalis'j stems slightly branched, leaves loosely imbricated, 



lanceolate, subfalcate, secund ; perichaetial ones similar to 

 the cauline ones. (TAB. VIII.) 



A. niv*dis. Hook, in Linn. Trans, v. 10. p. 395. t. 31. /. 4. Engl. 

 Bot. t. 2507. 



HAB. On rocks upon the highest summit of Ben Nevis 

 in Scotland, at the eastern end. 



The present fine species has been no where found in Bri- 

 tain except in the station above mentioned. On the most 

 elevated of the Swiss alps we have seen it upon the granite 

 rocks, retaining all the characters of the Scotch specimens. 

 In size it exceeds all the rest of the genus ; and individuals 

 with very falcate leaves bear a striking resemblance to Jun- 

 germannia juniperina. In its leaves it approaches to the 

 Andrcea last described ; but their form is lanceolate, by no 

 means subulate; their texture thinner, flexile; their colour 



