ORTHOTRICHUM (36). (partly) Perennial in round tufts; caps. erect, immersed or exserted, pear-shaped or elliptical, with 8, rarely 16, coloured striæ; peristome either single or double, sometimes absent; outer of 32 teeth, connected so as to seem 8 or 16, broad and flat, inner of 8 or 16 equal cilia, or 16 alternately shorter ones; lid short, conico-rostellate; calyptra large campanulate, with about eight furrows, base somewhat torn, and mostly covered with short hair-like processes, but not contracted. 89. † † Calyptra smooth, not plicate. _a._ Teeth 16, equidistant. * Perennial, caulescent, cæspitose. ENCALYPTA (partly) [29.] _vide ante. p. 2._ SCHISTIDIUM. Caps. immersed, obovate or roundish, mouth wide; calyptra small, conico-mitriform, columella adhering to the deciduous lid; teeth large, barred, without medial lines, often perforate. Infl. monoicous or dioicous (included in _Grimmia_). GRIMMIA (32). Caps. pedicillate, seta often flexuose, ovate or oblong, rarely ventricose, sometimes striated, teeth large lanceolate, barred, perforate, bi-trifid; calyptra five-lobed at base, sometimes dimidiate; columella free. Infl. monoicous or dioicous.; areolæ small dense, larger at base. 77. RACOMITRIUM (33). Caps. oblong, erect, smooth, on a straight pedicel, teeth bi-trifid, sometimes very long, sometimes short, filiform unequal; calyptra large, with a subulate solid papillose beak, lid conico-subulate, straight; leaves with sinuous areolæ. Infl. dioicous. 86. * * Annual or biennial, gregarious; leaves setaceous. CAMPYLOSTELIUM (8). Caps. drooping, on a bent seta oblong, smooth; teeth long lanceolate, barred, entire at base, cleft at summit, and connected by a membrane at base; calyptra small, conico-subulate, five-cleft at base. Infl. monoicous; barren fl. gemmiform; areolæ minute, much enlarged and diaphanous at base. 36. BRACHYODUS (9). Caps. oblong sub-striate, teeth very short truncate, partly confluent, equidistant; lid convex with a slender beak; calyptra conical, three to five-lobed at base, sub-dimidiate. Infl. monoicous gemmiform. St. very short, annual or biennial. 36. _b._ Teeth 16, in pairs, plane, reflexed when dry. SPLACHNUM (65). Caps. sub-cylindrical or ovate, on a very large spongy coloured apophysis; teeth lanceolate oblong obtuse, plane, yellowish; calyptra small, entire or lacerated at base. Infl. generally dioicous; barren, fl. capituliform, naked or with small scattered leaves. 133. _c._ Peristome a conical plicate membrane.