The English flora - SeaweedAfrica

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 concave
nerveless rigid the margins involute, lid conico-acuminate
rather shorter than the oblong capsule. Hook, et Greville in
— T. rigida, Fl. Brit. p. L249. E. Bot. t. 180. Schwaegr. Sttppl.
r \. j>. I Is.— Barbula rigida, Hedw. St. Cr. r. \./>. .">. t. l'.">.
Brewst. Journ v. \. />. 288. Muse. lint.