128 D I P L O P E R I S T O M I. [ Orthotrichum. 



outer one erect, never deflexed, and by its more pilose calyptra. 



6. O. diaphanum ; stems erect (very short) leaves lanceolate 



acuminate diaphanous at the points, calyptra slightly hairy. 

 (TAB. XXL) 



Orthotrichum diaphanum. Schrad. Spicil. p. 69. Smith, Fl. Brit, 

 p. 1265. Engl JBot. t. 1324. Schwaegr. Suppl. v. 1. P. L p. 31. t. 



55. Moug. et Nestl. n. 325. Funck, Deutschl Moose, t. 23. / 10. 

 Hobson, Brit. Mosses, v. I. n. 55. Hook. Fl. Scot. P. II. p. 137. 

 Arn. Disp. Muse. p. 18. Hook, and Grev. in Edin. Journ. of Science, 

 v. 1. p. 123. Drummond, Muse. Scot. v. I. n. 59. 



Orthotrichum aristatum. Smith, Fl. Brit. p. 1265. Turn. Muse. 

 Hib.p. 100. t. 9.f. 2. 



HAB. Trees, walls, roofs, and old pales, especially near 



the sea. 



An extremely common species, distinguished readily enough 

 by the diaphanous points of the leaves. The teeth are 16, not 

 approximated in pairs. 



7. O. rivulare; stems procumbent, leaves broadly lanceolate 



obtuse, cilia3 setaceous, calyptra glabrous. (TAB. XXI.) 



Orthotrichum rivulare. Smith, Fl. Brit. p. 1266. Turn. Muse. 

 Hib. p. 9.6. t. 8. Engl. Bot. t. 2188. Hobson, Brit. Mosses, v. 2. n. 

 46. Hook. Fl. Scot. P. II. p. 137. Drummond, Muse. Scot. v. 2. n. 



56. Arn. Disp. Muse. p. 18. Hook, and Grev. in Edin. Journ. of 

 Science, v. I. p. 123. Schwaegr. Suppl. v. 1. P. II. p. 31. Brid. 

 Meth.p. 111. 



HAB. Rocks and streams. 



Two or three inches long, vieing with O. striatum in size, of 

 a very dark lurid green, leaves very obtuse; ciliae extremely 

 narrow, and arising from the sides of the teeth. This moss ap- 

 pears to be unknown to the Continental Muscologists, though 

 found in various parts of our own country. 



8. O. striatum; stems erect, leaves lanceolate patent straight 



when dry, capsule ovate smooth, cilise torulose, calyptra 

 slightly hairy. (TAB. XXI.) 



Orthotrichum striatum. Hedw. St. Cr. v. 2. t. 3.f. 9.? Smith, Fl. 

 Brit. p. 1263. Engl. Bot. t. 2187. Turn. Muse. Hib. p. 95. (exd. 

 var. .) Moug. et Nestl. n. 324. Funck, Deutschl. Moose, t. 23. /. 11. 

 Hook. Fl. Scot. P. II. p. 137. Hobson, Brit. Mosses, v. 1. n. 56. 

 Drummond, Muse. Scot. v. 1. n. 56. Arn. Disp. Muse. p. 18. 

 Schwaegr. Suppl. v. 1. P. II. p. 29. t. 54. Hook, and Grev. in Edin. 

 Journ. of Science, v. 1. p. 123. Brid. Meth. p. 111. 



