Sub-genus II. Ptychodium. Branches sub-pinnate; l. patent and secund, often deeply sulcate, thinly nerved to apex; areolæ shortly linear, quadrate at the angles; caps. cernuous, horizontal, ovate; per. teeth dense and narrow, lamellose, cilia rudimentary.
433. H. (Ptychodium) PLICATUM. Schl. St. creeping,
tomentous; branches ascending incurved; l. ovate, imbricate,
pointed, margin recurved; per. l. twice as large; caps. ovate-oblong,
small, on a half-inch reddish seta: dioicous.
Alpine rocks. S. IV. (?)
Sub-genus III. Camptothecium. Stems trailing in
part, sub-erect, branched; l. silky, striate, thinly
nerved, areolæ narrowly linear; caps. cernuous,
on a smooth or rough incurved seta; lid shortly
rostrate or conical; internal perist. with long
cilia.
434. H. (Camptothecium) LUTESCENS. Dill. St. about
3in. irregularly branched, sometimes pinnate; l. narrowly
lanceolate, tapering to a long point, entire, nerved nearly to
apex; caps. oblong arcuate, on a rough seta; lid conical,
beaked: monoicous.
Rocks and woods (limestone and sandstone). IV.
435. H. (Camptothecium) NITENS. Dill. St. 2-4in. erect, almost pinnate, radiculose; branches short spreading; l. erecto-patent, lanceolate, long tapering, acute, not nerved to apex, entire, margin recurved; caps, arcuate oblong, on a long smooth seta; lid conical: dioicous.
Bogs. E. S. IV. V.
