ovate elliptical, curved, more or less pendulous; lid conical, shortly beaked.
Shady banks and rocks, usually barren. III. IV.
var. β. collinum. "st. erect tufted; l. sub-secund."
482. H. (Plagiothecium) sylvaticum. Dill. St. longer, about 1 inch, decumbent branched; l. sub-complanate, sometimes sub-secund, ovate-lanceolate, not acuminate, entire, distinctly two-nerved nearly half-way; caps. cylindrical, curved, inclined, or horizontal; lid long, shortly beaked.
Roots of trees in woods, &c. IX.
483. H. (Plagiothecium) undulatum. Dill. St. and br. procumbent, 2in. or more; l. complanate, ovate, acute, not acuminate, entire, undulate, faintly two-nerved, whitish green; caps. cylindrical, tapering at base, cernuous or horizontal, striate when dry, lid with a short beak.
Woods and moist places. IV.—VII.
Sub-genus XI. Amblystegium. Plants small prostrate,
sparingly branched; l. soft, generally opaque,
simply nerved, rarely nerveless; areolæ hexagono-rhomboidal
parenchymatous, or tubular
prosenchymatous; caps. sub-erect or incurvo-cernuous,
oval and sub-arcuate cylindrical,
opaque, on a smooth seta; lid large, tumidly
conical, obtuse; internal perist. generally integrate,
cilia more or less perfect, rarely none.
1. L. opaque, areolæ all parenchymatous.
a. Dioicous.
484. H. (Amblystegium) Sprucei. Bruch. St. short, slender, with few branches; l. distant narrowly ovate-
