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 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.

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. 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. 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.