G-12 MUSCI. (mosses.) 



Acrocarpi ; stems firm from a suberect rhizoma (hence forming more compact 

 tufts), almost woody, triangular, dark purple, shining ; leaves rigid and coria- 

 ceous, linear-lanceolate, below sheathing, above spreading, and mostly occupied 

 by the broad lamelligerous costa. (Name from noXvs, many, and #pt£, rpi^os, 

 a hair ; from the hairy covering of the calyptra.) 



1. P. C4>8BB!Biiane, Linn. Stems erect, mostly simple ; leaves spreading 

 or recurved, flat, serrate on the margins and back ; the lamellae somewhat 2-clcft 

 at their margins ; capsule oblong, 4-sided, the angles acute ; operculum shortly 

 rostrate from a convex base. — Shady moist places ; common. — Plant 6' -12' 

 high. (Tab. 17.) (Eu.) 



2. P. foi'BiaosaiSBI, Hedw. Differs from the preceding by its longer and 

 slightly curved capsule with obtuse angles, a smaller obconic apophysis tapering 

 into the pedicel, and the conical operculum. — Woods, around the base of trees, 

 &c. (Eu.) 



3. P. gracilc, Menzies. Usually somewhat smaller than No. 1 or 2 ; 

 capsule ovate, 4 - G-sided, obtuse-angled ; operculum long-rostrate ; the hairy 

 covering of the calyptra shorter than the capsule ; spores larger ; basal mem- 

 brane of the peristome not emergent, — Boggy places, Ipswich, Massachusetts, 

 Oakes. (Eu.) 



4. P. juiiapes'SimiiB, Hedw. Stem simple or divided ; leaves linear- 

 lanceolate, awn-pointed, denticulate on the back, the margins indexed, entire ; 

 capsule and operculum as in No. 1. — Var. strictum. Stems elongated, slen- 

 der; leaves appressed; capsule cubical. — Margins of woods, in exposed places, 

 &c. — Plant 4' -7' high; the variety subalpine. (Eu.) 



5. P. piliferum, Schreb. Stems simple; leaves clustered at the sum- 

 mit, lanceolate, the margins inflexed, entire ; costa excurrent into a long diaph- 

 anous and spinulose awn ; capsule ovate-oblong, 4-sided ; operculum conical, 

 rostrate. — Rocky places, in mountainous districts. — Plant 2' -4' high. (Eu.) 



Tribe XIX. BRYEiE. 



46. TIM MI A, Hedw. (Tab. 17.) 



Calyptra large, cuculliform. Operculum hemispherical, papillate or with a 

 central depression. Capsule oblong, subpyriform, erect-cernuous, broadly an- 

 nulate, long-pedicellate. Peristome double ; the exterior of 1 6 lanceolate ge- 

 niculate-incurved teeth ; the interior, a membrane divided half-way into 64 cilia 

 coherent in fours at their apices. Inflorescence monoecious : male flower gemmi- 

 form, axillary. — Partaking more or less of the characters of Milium, Aulacora- 

 nion, and Polytrichum ; stems caspitosc, ascending from a decumbent radicu- 

 lose base, innovating sparingly above ; leaves of a firm and rather rigid texture, 

 sheathing at the base, elongated-lanceolate, spreading, strongly dentate, with a 

 stout and terete percurrent costa ; areola rotund above, elongated-hexagonal 

 below. (Named after ,/. C. Timrn, a German botanist.) 



1. T. megapolstrtlia, Hedw. — The calyptra is often arrested in its 

 growth, and found attached to the pedicel, having given egress to the capsule by 



