139. T. CRISPULUM. Bruch. St. ¼–1in., l. lower lanceolate, distant; upper crowded, longer, linear-lanceolate concave cucullate at apex, crisped when dry; nerve prolonged into a short mucro; caps. oval, erect, regular; lid with an oblique beak; perist. t. in unequal pairs. Limestone rocks near the sea; Ormes Head; Anglesea; Bristol. VI. VII. var. β. _brevifolium._ l. shorter, lanceolate, acuminate, caps. smaller. γ. _angustifolium._ l. narrowly linear-lanceolate crowded, apiculate. 140. T. FLAVO-VIRENS. Bruch. Müller. St. short, with innovations from summit (interruptedly comose); l. oblong-ligulate, obtuse mucronate, margins entire undulate incurved; fruit-stalk red, slightly flexuose; thick nerve prolonged into a short mucro; caps. oblong-cylindrical pale yellowish brown, with a red mouth; per. t. elongate, regular, in pairs. Lid acuminate, half as long as caps. with an oblique beak. Shoreham, Sussex; Plymouth (Holmes), Malahide (Dr. Moore). [W. Mitten. Jour. Bot., VI., p. 97.] 141. T. LITTORALE. Mitten. St. elongate, tufted, more or less interruptedly comose; l. erecto-patent, oblong-ligulate obtuse, channelled, recurved towards apex, with nerve excurrent into a short mucro; basal cells hyaline oblong and rectangular. Ireland; Whitsand Bay, Cornwall; Hastings, (loc. cit. p. 99.) 142. T. (DITRICHUM) TENUE. Hedw. Dwarf, branched. L. from an erect base, patent or secund, narrowly lanceolate, uppermost lanceolate-subulate; per. l. sheathing half their length, quite entire; caps. oblong erect or a little curved, lid conic rostrate. Carn Lochan and Mael Girdy, 1863 (Crombie); Clova (Fergusson). [Dr. Braithwaite, Jour. Bot. VIII. 228.] β. _glaciale._ in long broad tufts with broader erecto-patent leaves. (This is _Ditrichum zonatum_ Lorenz.) SECT. II. L. subulate from a lanceolate base. _A. dioicous._ 143. T. TORTILE. Schrad. St. ¼in. gregarious, sub-flexuose; l. mostly secund, somewhat falcate, margin reflexed, nerve excurrent into the slightly toothed apex; caps. small cylindrical, erect, regular or curved; lid conical, slightly rostrate; per. teeth irregular, purplish red. Sandy places, rare; Belfast, Yorkshire, Sussex. X. XI. 144. T. FLEXICAULE. Br. & S. St. 1–3in. flexuose, cæspitose, with fastigiate branches; l. longer and more setaceous than in last, flexuose, concave, usually secund, nerve broad, excurrent, toothed at apex; caps. erect, small, ovate-oblong; annulus present; per. teeth long irregular. Scotch and Derbyshire mountains (calcareous). VI. var. β. _densum._ densely cæspitose; l. straighter. 145. T. HOMOMALLUM. B. & S. St. scarcely ½in. cæspitose; l. subulato-setaceous from a broadish base, mostly secund, nerve broad, much excurrent; caps. erect oblong-ovate, brown on a long red seta; annulus present; lid short conical obtuse; basilar membrane of perist. very narrow. Sandy banks. Autumn.