Leptotrichum.] BRYACE.^. 107 



3. L. horaomallum, Ilampe. Plants loosely cespitose, 

 bright green, short, about two cm. long : leaves open or turned 

 to o]ie side, ovate, concave at base, abruptly subulate ; costa 

 stout, excurrent into a long very entire point ; perichoetial 

 leaves with a long clasping base, abruptly and narrowly seta- 

 ceous-subulate : capsule oblong-ovate or elliptical, thick-walled, 

 reddish ; lid short, conical ; teeth without a basilar membrane, 

 the segments free or partly united, dark red ; annulus broad, com- 

 pound, revoluble. — Linnaea, xx. 74; Sehimp. Syn. 141. Didi/- 

 modon liomomallus, Hedw. Spec. Muse. 105, t. 23. Tricho- 

 stomuni heteromallum, Bruch & Sehimp. Bryol. Eur. t. 181. 



Hab. On the grouutl, west side of the Eocky Mountains {Dnanmond, 

 n. 119); roadsides, etc., in the White Mountain region, common (Aristin). 



4. L. flexicaule, Hampe, 1. c. Stems long, slender, radi- 

 culose, soft, yellowish or dirty green, repeatedly divided by 

 innoA^ations : leaves open or turned to one side or even falcate, 

 lanceolate, long-subulate, the excurrent costa denticulate at the 

 apex : capsule long-pedicellate, small for the size of the plants, 

 ovate or elliptical-oblong, regular or slightly curved ; lid nar- 

 rowly conical, erect ; teeth unequal, with free slender fragile 

 segments. — Cynodontiwn flexicmde, Schwaegr. Sup pi. i. 113, 

 t. 29. Trichostomum flexicaule, Bruch & Schimj). Bryol. Eur. 

 t. 180. 



Var. densum, Sehimp. Plants shorter, in compact tufts : 

 leaves erect, shorter. — Syn. 145. 



Hab. On shaded limestone rocks in subalpine regions; British 

 America {Dnimmond) ; Cascade River (Lyall); Placer River Canon 

 (Macoun); Alaska {Rothrock). 



* # Flowers monoecious. 



5. L. pallidum, Hampe, 1. c. Plants short, loosely cespi- 

 tose, pale or yellowish green : leaves open, erect, spreading or 

 curved to one side, lanceolate at base, very narrowly subulate, 

 the long excurrent costa distinctly denticulate : male flowers 

 gemmiform in the axils of the comal leaves : capsule ovate- 

 oblong, reddish, on a very long pale yellow pedicel ; lid conical, 

 short-beaked; teeth divided into unequal segments, free or 

 connate at the articulations, dark purple, twisted when dry. — 

 Ti'ichostomum paUidum, Hedw. Muse. Frond, i. 71, t. 27 ; 

 Bryol. Eur. t. 183; Sulliv. Mosses of U. States, 26. 



Hab. On bare sandy or clayey soil in woods; common. 



