Tortula.] MUSCI-ACIIOCAKPI-PERISTOMI. 43 



25. D. subuldtum, Hedw. (awl-leaved Fork-3Ioss); stems 

 branched, leaves from a broad sheathing base subulato-setaceous 

 secund entire, capsule ovate subcernuous, lid with a long beak. 

 Hedw. Sp. Muse, t. 34. Turn. Muse. Rib. p. 63. Fl. Brit. 

 p. 120G. E. Bot. t. 1273. Schwaegr. Suppl. v. 1. p. 173. Drum. 

 Muse. Scot. v. 2. n. 39. Muse. Brit. ed. 2. p. 103. t. 18. 



Moist banks. Mr, Drummond finds it not unfrequently upon the 

 Highland mountains. Fr. Autumn. — Closely resembling the preceding ; 

 but having a remarkably broad and sheathing base to the leaves. 



26. D.fulvellum, Sm. (tawny Fork-Moss); stems rather short 

 thickly tufted simple, leaves subulato-setaceous scarcely secund 

 those of the perichaetium convolute, seta hardly longer than 

 the leaves, capsule erect turbinate furrowed when old, lid conico- 

 rostrate. Fl. Brit. p. 1209. E. Bot. t. 2268. Grev. Scot. Cr. 

 Fl.p. 188, (excellent). Muse. Brit. ed. 2. p. 103. Suppl t. 3.— 

 Bryumfulvellum, Dicks. Cr. Fasc. 4. t. \\. f. 1. 



Highlands of Scotland. Ben More, Dicks. Ben Nevis, Mr. Berrer, 

 Rev. C. Smith. Ben Lawers, Grev. and Hooker. Clova mountains, not 

 unfrequent, Drummond. Summit of Snovvdon, Dr. Taylor. Fr. Autumn. 



— This is a very distinct species, with much of the habit of fVeiuia 

 acuta. The peristome is bright red, the teeth bifid or cut into segments 

 of various lengths, and sometimes perforated with clefts. 



20. Tortula. Hedw. Screw-moss. 



Seta terminal. Peristome single, of 32 spirally twisted teeth, 

 united more or less at the base into a tubular membrane. Ca- 

 lyptra dimidiate. (Muse, Brit. t. 2.) Named from tortus, 

 twisted, in allusion to the nature of the peristome. 



* Leaves thick and rigid. 



1. T. enervis, Hook, and Greville. (nerveless rigid Screw- 

 Moss),- stems very Bhortj leaves few Ungulate very obtuse con- 

 cave nerveless rigid the margins involute, lid conico-acuminate 

 rather shorter than the oblong capsule. Hook, et Greville in 

 Brewst. Journ v. \. />. 288. Muse. lint. <tl. 2. p. 52. Suppl. t.-J. 



— T. rigida, Fl. Brit. p. L249. E. Bot. t. 180. Schwaegr. Sttppl. 

 r \. j>. I Is. — Barbula rigida, Hedw. St. Cr. r. \./>. <>.">. t. l'.">. 



Walla and clay banks, near Yarmouth. Stiblington, (Cent, Rev. J. 

 M. Berkeley. FV.Dec. 



2. T. brevirSstris, Hook, and (ireville, (short-beaked rigid 

 Screw-Moss); stems rery short, Leaves few rotnndato-elliptical 

 very obtuse concave nerveless rigid the margins involute, 

 Lid conical scarcely beaked half the Length of the oblong cap- 

 sule. Hook, it Grev. in /inns'. Journ, v. [.p. 289. t -. Muse 

 lint. ed. -J. p. :>'-!. Suppl t. 2. Grev. Scot Cr. FL v. 6. t. 331. 



— T. rigida, Funch, DeutschL Moose, t. I.">. 



On an old wall near Edinburgh, I). Stewart, fifg. Fr. Winter. 



8. T. rigida, Turn. (Aloe-Uh rigid Screw- Moss); stem rery 

 -huri. Leaves few Linear incun ed submacronulate rtooi ed oen ••! 



