488. H. (Amblystegium) radicale. P. Beauv. St. creeping, with sub-erect rigid branches; l. spreading, ovate-lanceolate from a cordate or deltoid base, twice as large as last, and strongly nerved almost to the long tapering apex; per. l. larger serrate; seta long (sometimes 2in.); caps. oblong, much curved, cernuous, not red at mouth; lid conical, with a short sharp beak.
Moist ground amongst grass. Wales. IV. V.
489. H. (Amblystegium) irriguum. Hook. St. procumbent rigid, sometimes pinnate; l. spreading, secund, gradually tapering to a point from a deltoid-ovate somewhat decurrent base, sub-serrulate, strongly nerved nearly to apex; caps. oblong, cernuous, curved, when dry more so, and contracted at mouth; annulus persistent; lid conical, blunt pointed.
Stones in rivulets and streams. IV.
490. H. (Amblystegium) fluviatile. Swartz. St. procumbent, with simple, prostrate, not rigid branches; l. ovate or ovate-lanceolate, acute, entire, concave, strongly nerved almost to apex; caps. slender, elliptical, elongate, sub-erect, only slightly curved; lid conical.
Rocks and stones in mountain streams. V. VI.
2. L. areolæ narrow, rhomboido-hexagonal, prosenchymatous
at base only, rectangulo-6-gonal.
491. H. (Amblystegium) riparium. Dill. St. longer,
creeping, with sub-pinnate sub-erect branches; l. spreading,
sub-complanate, ovate-lanceolate entire, nerved two-thirds or
more; caps. oblong cylindrical curved, cernuous, contracted
at mouth when dry; lid conical pointed.
Stones, &c., near pools, sometimes in water. V. VI.
