serrulate, scarcely twisted when dry, nerved to or beyond apex; areolæ oval, rather large, larger rhomboid and pellucid at base; caps. oblong curved, cernuous, lid conical acute: dioicous.
Marshes, wet rocks. IV.
var. β. vallisclausæ. Brid. l. sub-secund, nerve very
strong and excurrent. Ormeshead; Derbyshire.
Sect. IV. St. robust, without radicles, irregularly pinnate; l. scariose, shining, strongly rugose; areolæ vermicular above, the rest small quadrate; caps. sub-arcuate, lid rostrate, annulus broad.
511. H. rugosum. Dill. St. 2-3in. rigid, erect, densely
tufted; br. recurved; l. crowded, falcato-secund, serrulate
and recurved at margin, lanceolate-acuminate from a broad
base, rugose at back, nerved more than half way; caps. sub-*cylindrical
curved, pale reddish brown; lid large yellowish,
with an oblique beak: dioicous.
Limestone and other rocks; barren in England. Spring (?)
Sect. V. St. creeping, cæspitose, pinnate, l. curved
secund, areolæ loosely rhomboid; caps. incurved
cernuous, compressed below mouth when dry.
512. H. INCURVATUM. Brid. St. short slender, branches
curved upwards; l. ovate-lanceolate, tapering, all pointing
upwards, entire, shortly two-nerved; caps. small, ovate,
horizontal; lid short, conical, acute: monoicous.
Shady walls and stones. VI. VII.
