BRYACE^E.] 163 \Bryum. 



Dioicous ; filiform, in dull silky green tufts often obscured by muddy 

 deposit. Leaves densely crowded, imbricated, sometimes with axillar 

 bulbils, ovate or elliptic, less concave, more or less acuminate with a 

 short recurved acute apiculus, entire or obsoletely denticulate at apex ; 

 nerve yellowish, lost in the point, cells laxer, narrowly hexagono- 

 rhomboidal, indistinctly curved. 



HAB. Dripping subalpine rocks, rare. Fr. unknown. 



Caldron Snout, Teesdale (Spruce 1843)!! Knockavohila, Kenmare (Taylor). Ochil 

 hills $ (Lyle 1849) ! Black Force, Yorks. (Binstead 1886) ! ! Kisdon Force, East 

 Gill and West Stonesdale beck in Upper Swaledale (R. Barnes 1889) ! ! Stanner rocks, 

 Radnor (Binstead 1892) ! ! 



A softer plant than B. filiforme, readily known by the acutely pointed 

 leaves which are not closely appressed but divergent at point. 



Sect. 2. CLADODIUM. Leaf-cells hexagono - rhombic ; endostome 

 adherent to teeth of peristome or free and without cilia, or with short 

 exappendiculate cilia. 



3. BRYUM LACUSTRE (Bland.) Brid. 



Synoicous ; stem short, branched. Leaves ovate, acute, concave, 

 with recurved margins, nerved to apex. Caps, pendulous, pyriform, lid 

 small apiculate. (T. LXIX, E.) 



SYN. Mnium lacustre BLAND. Muse, exsic. n. 132 (1804). ROEHL. Deutsch. fl. iii, 96 (1813). 

 SCHWAEG. Suppl. I, P. II, 124, t. 79 (1816). SCHULTZ Suppl. Fl. Starg. 86 (1819). 



Hypnum lacustre WEB. MOHR Bot. Tasch. 285 (1807). 



Bryum lacustre BRID. Mant. 120 (1819). BR. SCH. Bry. eur. fasc. 6 9, Mon. 16, t. 2 



(1839). C. MUELL. Synops. i, 268 (1849). RABENH. Deutsch. kr. fl. ii, S. 3, 202 (1848). 



WILS. Bry. br. 229, t. 48 (1855). SCHIMP. Synops. 352 (1860), 2 ed-422. BERK. Handb. 



br. m. 191 (1863). MILDE Bry. siles. 207 (1869). HOBK. Syn. br. m. 112 (1873). HUSN. 



Muse. gall. 237, t. 64 (1889). JURATZ. Laubm. oester.-ung. 264 (1882). BOUL. Muse. 



de Fr. i, 274 (1884). LIMPR. in RABENH. D. kr. fl. Laubm. ii, 315 (1892). 

 Bryum caspiticium Var. HOOK. TAY. Muse. br. 121 (1818). 

 Bryum cernuum BRID. Bry. univ. i, 851 (1827). 

 Bryum Webera lacustris BRID. Bry. univ. i, 636. 

 Pohlia lacustris HUEB. Muse. germ. 483 (1833). 



Synoicous ; widely tufted, the stems short, radiculose, branches 

 longer. Leaves rather solid, chlorophyllose, lower small distant, 

 broadly ovate, acuminate, upper suddenly larger, forming a patent coma, 

 broadly oblong, acutely acuminate, carinate-concave, margin entire not 

 thickened, broadly reflexed ; nerve strong, rufous, vanishing below the 

 apex or excurrent in an apiculus, cells scarcely thickened. Vaginula 

 thick, covered with paraphyses ; fruit varying in size and length of seta 

 in the same tuft, caps, small, on a long slender seta, inclined or rarely 

 pendulous, oblong-pyriform, slightly incurved, soft, pale brown with a 



