2 SCHISTOCARPI. [Andrea. 



* Leaves destitute of nerve. 



1. A. Alpina; stems branched, leaves obovate suddenly acumi- 



nated straight imbricating the stem on all sides. (TAB. VIII.) 

 Andraea Alpina. Hedw. Sp. Muse. p. 49. Turn. Muse. Hib. p. 13. 

 Smith. Fl. Brit. p. 1179. Engl. Bot. t. 1278. Hook, in Linn. Trans, v. 

 10. p. 388. t. 31. f. 1. Schwae.gr. Suppl. v. 1. p. 42. Moug. etNestl. n. 

 115. Hobson, Brit. Mosses, v. 2. n. 1. FtmcA, Deutschl. Moose, t. 6. n. I. 

 Brid. Meth. p. 207. Grev. and Arn. in Wern. Trans, v. 4. t. 7. / 14. 

 (for the fruit. ). Arn. Disp. Muse. p. 6. Hook. Fl. Scot. P. II. p. 120. 

 Drummond, Muse. Scot. v. 2. n. 1. 

 Andraea petrophila. Ehrh. 



Jungermannia alpina. Linn Dill. Muse. t. S3. f. 39. 



HAB. Ireland, Wales, and Scotland, especially in alpine and 

 subalpine districts, upon rocks, but not very common. 

 On Ben Nevis in great abundance and perfection. 

 This species varies in the looseness or compactness of the 

 growth both of its stems and leaves, and somewhat in the colour 

 of the latter, which we have now and then seen in damp and 

 shady situations of a pale and yellowish brown. 



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



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



Andrsea rupestris. Hedw. Sp. Muse. p. 47. t. 7. / 2. Engl Bot. t. 

 1277. (not of Fl. Brit.). Hook, in Linn. Trans, v. 10. p. 391. t. 31. / 

 2. Schwaegr. Suppl v. 1. p. 42. Hook. Fl. Scot. P. II. p. 121. Hob- 

 son, Brit. Mosses, v. I. n. 1. Drummond, Muse. Scot. v. 2. n. 3. Arn. 

 Disp. Muse. p. 6. 



HAB. Rocky mountainous situations throughout Great 



Britain. 



The excellent Dr. Mohr was, we believe, the first who ac- 

 curately distinguished this species, which in size most resembles 

 A. Rothii ; but in the structure of its leaves, and especially in 

 the absence of a nerve, A. Alpina. From the latter, the form 

 and direction of its foliage, together with 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, those of the perichaetium oblong nerve- 

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



