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Sub-genus XII. eu-HYPNUM. St. erect or procumbent, sometimes radiculose and pinnate; l. patent, squarrose, or falcato-secund, nerve various or none; areolæ narrowly linear,, often dilated, and transparent at base; caps. incurved cernuous on a smooth seta; lid convexo-conical, mammillate, rarely rostrate; perist. perfect.

''Sect. I.'' Branches straggling or sub-pinnate; l. squarrose-divaricate or stellate and patent.

a. Monoicous.

492. L. Jun. St. creeping, with pinnate erect branches; l. crowded lanceolate, recurved from a roundish ovate base, acuminate, serrulate, almost squarrose, faintly two-nerved at base or nerveless; caps. oblong curved cernuous; lid conical, blunt.

Alpine rocks, rare.

493. Hedw. "St. procumbent, branches simple, erect, slender; l. spreading, almost squarrose, sub-secund, ovate-lanceolate, acuminate, entire, nerveless; caps. oblong, curved, cernuous, lid conical." [Bry. Brit.]

Limestone walls, banks and rocks.

b. Dioicous.

494. Spruce. St. elongate, slender, with sub-*pinnate slender sub-erect branches: l. distant, spreading; br. l. lanceolate-subulate, apex almost setaceous, secund; st. l. wider, less secund; all entire, nerved nearly or quite to