Bryace^.] 159 [Bryum. 



Synops. i, 289 (1849). Wils. Bry. br. 248, t. 36 (1855). Hobk. Syn. 120 (1873). 

 JuRATZ. Laubm. oester.-iing. 297 (1882). Boul. Muse, de Fr. i, 2gi (1884). 



Pohlia demissa Hues. Muse. germ. 466 (1833). De Not. Syllab. 113 (1838). 



Zieria demissa Schimp. Coroll. 6g (1856), Synops. 385 (i860), 2 ed. 473. Berk. Handb. 

 br. in. 188 (1863). De Not. Epilogo 433 (1869). Hobk. Syn. 2 ed. 156 (1884). 

 Lesq. James Moss. N. Amer. 241 (1884). 



Plagiobryiim demissum Lindb. Oefv. vet. ak. foerh. 1862, p. 606. HusN. Muse. gall, i, 

 224, t. 60 (1888). LiMPR. in Rabenh. D. kr. fl. Laubm. ii, 228, Fig. 268 (1892). 



Dioicous ; in dense rufescent tufts, stems very short, radiculose, 

 with many very short innovations. Lower leaves ovate-acuminate, the 

 nerve vanishing below apex, upper oblong-lanc, longly cuspidate with 

 the excurrent nerve, the margin recurved, all erecto-patent, rufescent by 

 age, cells rhombic-hexagonal above, rectangular at base. Caps, bent 

 down on an arcuate orange seta, irregular, gibboso-pyriform, pale brown, 

 lid small, mammillar, teeth lanceolate, ferruginous below, half the 

 length of the processes which cohere above by transverse trabeculse, 

 cilia I — 2, very short. Male infl. gemmaceous. 



Hab. — Rocks on the summit of Ihe Breadalbane range. Rare. Fr. 8. 

 Ben Lawers and Craig Chailleach. 



This fine moss only grows at the summits of the mountains in crevices 

 of rocks filled with black humus in which the roots are deeply fixed. The 

 position of the capsule varies with age, being at first horizontal, then bent 

 down by the curvature of the seta until it almost touches the leaves, and 

 when empty more or less erect. 



7. BRYUM Dill. 

 Catal. pi. circa Gissam 222 (1719). 



Plants generally with a pair of innovations below the floriferous 

 apex, thus becoming repeatedly dichotomous, the stems interwoven 

 with radicles. Leaves in 5 or 8 rows, semiamplexicaul, more or less 

 decurrent, smooth, ovate or lanceolate, rarely obtuse ; nerve terete, 

 usually excurrent, cells rather lax, hexagono-rhombic, and quadrate or 

 rectangular at base. Calyptra small cucullate. Caps, on a long wiry 

 seta, inclined or pendulous, pyriform to subglobose with a solid neck, 

 regular or slightly incurved, coriaceous, lid convex apiculate, annulate ; 

 peristome of 16 long lane, teeth, densely articulated in the lower half, 

 lamellate internally, endostome a i6-carinate membrane half the length 

 of the teeth, with 16 lanceolate keeled processes, gaping or perforated 



