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 seta, with a large annulus and short rostellate lid: dioicous.

Alpine rocks. Snowdon, Glen Callater.

33. RACOMITRIUM. B. & S.

A. Dichotomously branched, innovations simple fastigiate.

218. Bridel. Bry. Univ., , 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.

219. 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.

220. 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.

var. β. denticulatum. l. distinctly and distantly toothed at apex.