Rocks and stones in rivulets, frequent. XI.
Sub-genus IX. Thamnium. Dendroid from a creeping rhizome; l. sub-complanate, nerved, areolæ minute, quadrate or rhomboid at apex, narrowly oblong at base; caps. short and sub-arcuate with the seta, turgidly ovate, lid with a long beak; inner perist. with long appendiculate cilia.
475. H. (Thamnium) alopecurum. Dill. St. 2–3in. naked below, pinnately branched above; l. spreading ovate-lanceolate, somewhat concave, serrate, strongly nerved nearly to apex; caps. shortly ovate, cernuous or erect, lid with a long oblique beak: dioicous.
Moist woods, rocks, &c. XI.
Sub-genus X. Plagiothecium. St. generally prostrate, or partially erect, branched; l. complanate or secund, thin, silky, nerveless or shortly two-nerved; areolæ long hexagono-rhomboid; caps. sub-erect or cernuous, more or less incurved; lid convexo-conical or rostrate; per. teeth pale thin, internal a membrane with narrowish processes; cilia none or obscure.
A. Per. teeth distantly articulate, without cilia: dioicous.
476. H. (Plagiothecium) latebricola. Bry. Eur. (Leskea, Bry. Brit.) St. short, slender, sparsely branched, sub-erect; l. sub-secund ovate-lanceolate, tapering acute, entire, slightly concave, decurrent, faintly two-nerved; margin recurved; caps. elliptic-oblong, turbinate when dry; lid short, acutely conical.
Moist shady woods, decaying trunks, and ferns. Winter.