— 26B — 



72.B.acuta Bridel. — Tortula Brid. 1806; Barbula Brid. 1819; 

 Tortula gracilis Schleicher 1807; Barbula Schwsegrichen. 



Leaves ovate-oblong entire, reflexed below and strongly re- 

 curved near base, patent or twisted when dry; cells short; coeta 

 gen. short-excurrent or percurrent. Perichetial leaves suboblong 

 with subulate acumen; costa long-excurrent. Capsule oval- 

 oblong; annulus indistinct. Tufts oUvaeeous or green. — On 

 earth r. Eur. Switzerl.l Austria: C. E. Kindberg. France: 

 Berthoumieu. Amer. Can.: Macoun. 

 * B.abbreTiatifoIia H. Mueller. 



Leaves appressed when dry; costa often longer excurrent. — ^ 

 Wet alp. rocks, sometimes in running w^ater, r. Eur. Norwayl 

 73.B.viridis Schimper. 



Leaves longer than in B. acuta, narrowly ovate-lanceolate 

 subulate-acuminate serrulate or denticulate above, reflexed below, 

 crisped; basal cells short-rectangular; costa somewhat long-ex- 

 current. Perichetial leaves as in the last. Capsule cylindric 

 sometimes curved; annulus revoluble. Tufts green. — Rocks 

 in warmer districts r. Eur. Switzerl. near Luganol Belgium: 

 Gravet. {Asia, Syria: A. H. Brotherus.) 

 74.B.artocarpa Lesquereux. 



Differs from B. acuta: Upper leaves ovate-lanceolate subulate; 

 basal cells rectangular; costa more distinctly excurrent. Cap- 

 sule subcylindric. — On earth in higher alp. regions r. Amer. 

 U. S. Oregon mt Hood 3300 metr. a. sea: Roell. 



b. Leaves faintly papillose straight when moist. Peristome 

 twice contorted; annulus distinct. 

 75.B.icmadophiIa Schimper; Bi-aithwaite. 



Leaves narrowly ovate-lanceolate reflexed below but not 

 strongly recurved, longer acuminate than in B. acuta, appressed 

 when dry; lower basal cells short-rectangular; costa long-excur- 

 rent. Tufts olivaceous or dark green. Capsule oval-oblong. 

 Very r. fruiting. — Wet alp. rocks r. Eur. France: Theriot, 

 com. Husnot. {Asia, Caucase: V. F. Brotherus). 



C. Leaves faintly papillose or nearly smooth, curved when 

 moist; lower basal cells pellucid rectangular. 



aa. Costa of leaves subpercurrent, in the inner perichetial 

 long-excurrent. Peristome pale contorted. 

 7().B.p8eudo-rigidula Kindb. cat. Can. m. 



Leaves from short ovate base long-acuminate, reflexed below, 

 twisted when dry; costa brown. Inner perichetial leaves from 

 oblong base narrowly acuminate. Capsule brown subcylindric. 



