l. imbricate, sometimes secund, ovate-lanceolate from a narrow base, acute, scarcely nerved to apex; per. l. narrower nerveless; areolæ minute opaque; caps. cylindrical erect; lid conical, with an oblique beak: dioicous.
Damp rocks and rotten tree trunks. Den of Airlie, Forfarshire (Fergusson), 1868.
412. A. longifolius. Hartm. Rhizomes slenderer than No. 410, branches sub-fasciculate; l. somewhat secund, from an ovate base lanceolate tapering, very acute, nerved to apex; caps. ovate-oblong on a short seta; lid large conical rostellate.
Scotch mountains; fr. not found in Britain. Autumn.
77. HABRODON. Schp.
413. H. Notarisii. Schpr. (Pterogonium perpusillum, De Not.) St. creeping, irregularly branched; l. spreading squarrose opaque, imbricate and shining when dry, from an ovate base longly acuminate, nerveless, entire; per. l. internal with erose margins; caps. oval-oblong erect, slightly striate, and contracted at mouth when dry; lid conical erose. [Supp. Bry. Eur. fasc. III. IV.]
Trunks of elm and white thorn. Spring.
Windermere and Devon (J. Nowell); Killin, Perthshire (A. McKinlay), July, 1865; Ben Lawers (Hunt).
78. PTEROGONIUM. Swartz.
414. Pt. filiforme. Hedw. St. creeping, with incurved fasciculate branches; l. imbricate or secund, elliptical, concave, papillose at back, serrulate at pointed apex, margin
