squarrose, broadly cordate-acuminate, slightly striate; br. l. less spreading, sub-secund, roundish-ovate, less acuminate; all sharply serrate and mostly two-nerved at base, or nerveless; per. l. almost erect, much narrower; caps. ovate-oblong, curved, cernuous, on a rough seta: dioicous.
Moist shady rocks by cascades, &c. X. XI.
Sub-genus VIII. Rhynchostegium. Plants low cæspitose,
with scattered branches; l. soft, shining, nerveless
or simply nerved; areolæ elongate, narrowly
hexagono-rhomboid; caps. horizontal cernuous;
lid with a subulate beak.
a. Demissæ. St. prostrate, l. complanate, oblong-lanceolate, nerveless, entire; caps. thin walled; seta smooth: monoicous.
467. H. (Rhynchostegium) demissum. Wils. St.
filiform; br. short slender: l. elliptic-lanceolate, acute, sub-*secund
above, margin reflexed; caps. small, narrowly elliptical,
horizontal cernuous; lid obliquely rostrate.
Shady mountainous rocks. VII. VIII.
b. Tenellæ. st. creeping; l. narrowly lanceolate,
caps. solid walled, seta rough or
smooth: monoicous.
468. H. (Rhynchostegium) tenellum. Dicks. St. and
br. very short creeping; l. erecto-patent, narrowly lanceolate
acuminate, almost setaceous, light green, entire, nerved
more than half-way; caps. ovate cernuous, on a smooth seta;
lid beaked.
Walls and rocks, principally limestone. X.
