339. M. CUSPIDATUM. Hedw. St. ½–1in. tufted, erect, radiculose, barren shoots procumbent; l. lower ovate or obovate, scattered, upper ovate-lanceolate longer and narrower; all acuminate, with simply serrate margins; nerved nearly or quite to apex; caps. ovate, inclined or pendulous; lid convex obtuse: synoicous. Shady rocks and walls. III. IV. 340. M. ROSTRATUM. Schr. St. ½–1in. decumbent at base (barren long erect or creeping); l. lower ovate, upper oval-oblong, obtuse, in a terminal spreading tuft, all simply and bluntly serrate, undulate, nerve slightly excurrent into a mucro; caps. oval, inclined or pendulous; lid with a long curved beak: synoicous. Moist shady rocks, &c., common. IV. 341. M. RIPARIUM. Mitt. M.S. St. ½–1in., reddish below; l. orbiculate or broadly elliptical, much decurrent, apex rounded and tipped with a mucro; lower obscurely bordered, upper strongly so and simply spinuloso-dentate, nerve thin but distinct, reddish, reaching apex; areolæ large hexagonal chlorophyllose. (I have no fruited specimen.) Watery places. Sussex (Mitten). 342. M. SPINOSUM. Voigt. St. robust, sub-ligneous; branches flagelliform sub-arcuate; l. lower small squamiform, obtuse, margins plane; upper obovate or oblong, acuminato-spathulate, larger, crisped when dry; serration bi-geminate, spinulose, nerve excurrent; caps. oval-oblong, reddish brown, slightly inclined or horizontal; lid conical, with an obtuse beak: dioicous. Roots of trees, and shady sub-alpine rocks. Summer. Ben Lawers (McKinlay). 343. M. ORTHORHYNCHUM. Brid. St. ¼–1in. simple; l. lower scattered ovate-acuminate, decurrent, upper ovate-lanceolate, doubly spinuloso-serrate; all undulate and crisped when dry; caps. oval or sub-pyriform horizontal; lid conical, with a blunt beak: dioicous. Woods, shady banks, &c. Yorkshire, Sussex. Spring. 344. M. SERRATUM. Brid. St. ½–1in. purplish, erect; l. lower reddish on nerve and border, all varying from lanceolate to ovate, acuminate, doubly spinuloso-serrate; per. l. lanceolate; caps. ovate or oval, cernuous; lid large conical, with a short beak: synoicous. Moist shady rocks and banks. V. VI. 345. M. HORNUM. L. St. 1–3in. simple; l. linear-lanceolate, acuminate, rigid, slightly decurrent, doubly spinuloso-serrate, nerve also spinulose, not reaching apex; caps. large oblong-ovate, cernuous; lid convex mammillate; seta curved at summit: dioicous. Shady moist banks and woods, common. V. 346. M. UNDULATUM. Hed. St. 1–3in. decumbent at base, sometimes branched; l. oval-oblong or ligulate, upper very long, all undulate, decurrent, and simply serrate, nerved generally to apex; caps. generally several together, oval or oblong pendulous; lid convex, pointed: dioicous. Moist shady banks and woods. IV. V. _b._ L. without a cartilaginous border.