126 BETACE^. [Barbula. 



The more distant leaves, less open, recurved when moist, the stem- 

 leaves ovate, decurrent at base, and especially the larger broader capsule 

 with longer twice-twisted teeth, etc., separate this species from B. vinealis. 

 The above description, made from the examination of a large number of 

 specimens, slightly differs from that of Mueller. But this author has 

 compared specimens and confirmed their identity M'ith the foreign plant. 



28. B. rubiginosa, Mitt. Closely related to the preced- 

 ins: in the form aud areolation of the leaves, and to -Z>. vinealis 

 in the size and mode of growth, but differing from both in the 

 leaves merely ajjpressed and curved when dry, in the much 

 shorter lid, whose length is half that of the capsule, in the 

 absence of a peristome, and in the annulus composed of a triple 

 row of cells. — Journ. Linn. Soc. viii. 27, t. 5. Pottia rubigi- 

 iiosa, Watson, Bot. Calif, ii. 362. 



Hab. Northwest America (Douglas). 



29. B. semitorta, Sulliv. Plants short, simple, loosely 

 cespitose: upper leaves longer, tufted, erect, half-clasping at 

 base, horizontal, linear-lanceolate, with flat borders and a thick 

 percurrent costa : calyptra long and narrow, twisted ; lid en- 

 larged at base, subulate, blunt at the apex, slightly inclined : cap- 

 sule erect, regular, cylindrical-oblong ; teeth long, half-twisted ; 

 annulus simple, narrow, persistent. — Pacif. R. Kep. iv. 186, t. 3. 



Hab. Near Benicia, California (Birjeloio). 



Comparable to B. brachj/phylla, Sulliv., with which it is mixed, differ- 

 ing in the shorter calyptra descending only to the base of the longer lid, 

 the peristome less twisted, the leaves tufted at the top of the stems, 

 squarrose-spreading, gradually tapering from near the base and not 

 abruptly narrowed to the apex. 



30. B. artocarpa, Lesq. Densely cespitose ; stems slender, 

 short, generally simple: lower leaves short-ovate at base, lanceo- 

 late above, shortly cuspidate by the stout excurrent costa, the 

 upper longer and longer lanceolate-subulate ; cells of the areo- 

 lation small, round-quadrate above, rectangular and slightly 

 broader at base ; perichgetial leaves large, clasping at base, con- 

 tracted above, subulate, erect : capsule ovate-cylindrical, short, 

 slender, contracted at the orifice ; lid with a long-subulate more 

 or less curved beak ; teeth slender, whitish, once twisted ; annu- 

 lus simple, persistent. — Trans. Am. Phil. Soc. xiii. 4; Sulliv. & 

 Lesq. Muse. Am.-Bor. Exsicc. (ed. 2), n. 133. 



Hab. On the ground, Monte Diablo, California (Bolander) ; Monterey 

 (Watson). Kesemhling the following species in aspect, the characters of 

 the leaves, and form of the capsule, which, however, is annulate. 



