b. l. nerved.
423. L. pulvinata. Wahl. St. 1/2in. procumbent, slenderly branched; l. imbricate elliptic-ovate, narrowed below, concave entire, nerved half-way, or two-nerved at base; areolæ large, almost hexagonal; per. l. nerveless; caps. almost erect, oval oblong; lid conical pointed, falling early: monoicous.
Roots of trees near rivers, &c. V. VI.
424. L. polycarpa. Ehr. St. longer, densely tufted; almost pinnately branched; l. imbricate, sub-secund, ovate, tapering, stoutly nerved nearly to apex, margin entire, reflexed below; per. l. erect, striate; caps. cylindrical, erect, lid conical acute: monoicous.
Roots of trees. V. VI.
var. β. paludosa, generally more lax; caps. longer.
B. L. striate.
425. L. sericea. Dill. St. 1in. or more, creeping, branched; branches erect, curved; l. imbricate, sub-secund, lanceolate, long tapering, scarcely nerved to apex; areolæ very narrow; caps. almost erect, cylindrical, tapering above, on a rough seta; lid conical, obliquely beaked: dioicous.
Walls, rocks, and trunks of trees. XI.-III.
426. L. rufescens. Hall. St. 1-3in. erect, branched, with reddish-brown foliage; l. imbricate, almost erect, lanceolate, long tapering, often almost piliferous, nerveless, margins plane; caps. generally erect cylindrical, on a long smooth seta; lid shortly conical: dioicous.
Moist shady alpine rocks. S. X.
