Trichostomum.] BRYACE^. JQg 



1. T. tophaceum, Brid. Stems of various length : leaves 

 open from an erect base, soft, linear-lanceolate, obtuse, cari- 

 nate-concave, reflexed on the borders ; costa stout, vanishing 

 below the apex ; perichaetial leaves longer, more obtuse : cap- 

 sule ovate-oblong, on a thick red often flexuous pedicel ; lid 

 obliquely rostrate, variable in length : teeth unequal, the seg- 

 ments either free or jjartly connate, pale red ; annulus none. — 

 Muse. Recent. Suppl. iv. 84 ; Bryol. Eur. 1. 175. Didymodon (?) 

 diversifoliKS, Aust. 3Iusc. Appal, n. 115. 



Hab. Very common on moist limestone rocks; California (JJigrefow, 

 Bolander, Gibbons); Dallas County, Texas {Boll); Owen Sound, Canada 

 (Mrs. Roy); Niagara Falls (Olney), sterile. 



2. T. pyriforme. Plants cespitose, very short, dark straw- 

 color, the male plants much the smaller : stem-leaves lanceolate, 

 blunt at the apex, the upper longei", undulate on the borders, 

 all entire, concave, with the upper areolation close, opaque, 

 obsoletely papillose on the back ; costa stout, vanishing below 

 or at the apex ; perichaetial leaves longer, oblong and half- 

 clasping at base, lanceolate, distinctly undulate, obtuse : calyp- 

 tra reaching to the base of the lid : capsule short, obovate, 

 truncate, subpyriforra ; lid large at base, obliquely long-rostrate ; 

 teeth split nearly to the base into nearly equal filiform seg- 

 ments ; annulus large, compound, easily detached. 



Hab. Florida {Garber); communicated as n. 338. 



Allied to T. tophaceum in the character of the peristome and the obtuse 

 perichaetial leaves, hut different in the mode of growth, the size of the 

 plants, the subpyriform shape of the annulate capsule, etc. 



3. T. crispulum, Bruch. Plants densely cespitose, bright 



gi*een, slender: comal leaves open, involute or twisted when 



dry, linear from a slightly enlarged base, cucullate, incurved at 



the apex and mucronate by the excnrrent costa ; borders erect, 



flexuous; areolation very small, indistinct in the upper part; 



perichoetial leaves longer and mucronate : capsule elliptical, 



irregularly wrinkled when dry ; lid long-rostrate from a narrow 



red orifice ; teeth divided into irregular and unequal segments, 



connate or free, papillose; annulus none. — Regensb. Fl. xii. 



395, t. 4; Bryol. Eur. t. 173. 



Hab. On the ground, Guadalupe Island, Lower California {Palmer) ; 

 common in Europe, rare in America. 



4. T. flaVO-virens, Bruch. Plants loosely cespitose, spar- 

 ingly branching, 1 or 2 cm. long, yellowish green above, pale or 



