B. _monoicous._ 146. T. SUBULATUM. Bruch. St. ¼in. cæspitose; l. subulato-setaceous from an ovate base, spreading or somewhat secund, with a long excurrent nerve; caps. oval, lid large obliquely rostellate; seta somewhat flexuose; annulus none; basilar membrane very narrow; antheridia axillary naked. Cornwall (Rev.—Tozer). Spring. 147. T. GLAUCESCENS. Hedw. St. ½in., branches fastigiate; l. glaucous, linear-lanceolate, margin plane (upper crowded into a tuft or coma), nerve sometimes excurrent into the denticulate apex; caps. oblong-oval, pale brown, with a long beaked lid; basilar membrane very narrow; barren fl. gemmiform. Scotch mountains. Summer. 27. TORTULA. SCHREB. SECT. I. ALOIDELLA. L. rigid, covered on the upper side with articulated cellular filaments or gemmæ arising from the broad nerve. 148. T. STELLATA. Schreb. 1771. (_T. rigida._ Schultz,) St. minute, loosely cæspitose; l. spreading from an upright base oblong obtuse, margin inflexed membranaceous; caps. erect elliptical; lid with a long oblique beak; calyp. half as large as capsule; per. teeth long, and much twisted; dioicous. Limestone walls. XI. XII. 149. T. AMBIGUA. Br. & S. (larger in all its parts than last.) L. ligulate lanceolate, apex cucullate, margin incurved; caps. erect cylindrical; lid rostrate; calyp. very short; per. teeth filiform, little twisted; arcuato-incurved when dry: dioicous. Walls and banks (marly). XI. XII. 150. T. ALOIDES. Br. & S. St. as above; l. spreading, narrowly lanceolate, acute, with a strong nerve; caps. cylindrical inclined; lid conical, bluntly rostrate; per. teeth scarcely twisted, when dry widely spreading: dioicous. Clay banks. XI. XII. SECT. II. CUNEIFOLIÆ. L. broadly or spathulato-lanceolate. 151. T. LAMELLATA. Lindb. (_Pottia cavifolia_ var. _gracilis_. Bry. Brit.) St. very short cæspitose; l. rather lax erecto-patent, concave, lower smaller, roundish oval, piliferous, upper larger oval spathulate, nerve excurrent into mucro; caps. oblong sub-cylindrical, striate when dry, on a long red seta; lid with a long rather oblique beak; perist. that of a true _Tortula_, but so fragile as to have escaped notice, and always falling off with the operculum according to Dr. Schimper; monoicous. Banks and walls, Oxford (Boswell), Pontefract, Edinburgh (Nowell); Aldrington (Davies). II. 152. T. ATROVIRENS. Smith. Lindb. [_Didymodon nervosus_, Hook. & T. _Desmatodon nervosus_, Bry. Brit.] St. ¼in. densely cæspitose, branched; l. spreading oval or oblong concave, margins revolute, nerve thick, prolonged into a short mucro; areolæ small roundish larger and diaphanous at base; caps. oval-oblong, lid large conical with an oblique beak. Dry banks, &c., near the sea.