218. R. (Dryptodon) patens. Bridel. Bry. Univ., I., 192. (Grimmia patens. Bry. Brit., p. 158.) In dark green or fuscous tufts; st. 2–4in. branched, decumbent and naked below; l. spreading or slightly secund, oblong-lanceolate, gradually tapering to a blunt apex, margin recurved below, nerve strong two-winged at back; per. l. shorter; caps. almost obovate smooth, furrowed when dry, on a pale flexuose seta; annulus large; cal. five-lobed: dioicous.
Moist alpine rocks. S. I. W. IV. V.
219. R. ellipticum. B. & S. Blackish rigid tufts; st. 1in. decumbent and naked below; l. spreading from an erect base lanceolate oblong, strongly nerved to apex, margins plane thickened; caps. erect roundish smooth, on a short thick seta; lid large conical with a long slender subulate beak: dioicous.
Moist alpine rocks. Scotland, Wales, Ireland. XI.—IV.
220. R. aciculare. Brid. St. 1–3in. cæspitose, decumbent and naked at base, branches very leafy; l. spreading or secund, ovate-oblong or broadly lanceolate, obtuse, sometimes toothed at apex, to which the nerve does not reach; caps. erect oblong smooth, with a small mouth, and on a longer and thinner seta, lid with a long straight subulate beak: dioicous.
Wet mountainous rocks by streams. XI.—IV.
var. β. denticulatum. l. distinctly and distantly toothed at apex.
221. R. protensum. A. Braun. St. less rigid than last, and leafy at base; l. generally secund lanceolate-subulate obtuse, nerved to apex; per. l. sheathing; caps. sub-cylindrical thinner, on a pale seta; lid with a long subulate beak; calyp. lobed at base; dioicous.
Moist alpine rocks. Wales, Derbyshire, Yorkshire. IV.
222. R. sudeticum. B. & S. St. slender, decumbent and naked at base, l. spreading recurved keeled lanceolate tapering into a long whitish diaphanous denticulate point; caps. small ovoid on a short seta, lid with a shorter acute beak. IV.