Best : North American Pseudoleskea 229 



4. Pseudoleskea denudata Kindberg, Eur. & N. Am. Bry. 2 : 



52. 1896. [PL 6] 



Pseudoleskea sciuroides, var. denudata Kindb. Cat. Can. Plants 

 6: 181. 1892. 



? Ptychodium oligocladum Limpricht, Die Laubmoose, 2 : 801. 

 1895. 



In loose spreading tufts, pale yellow-green above, dirty white 

 below ; stems nearly destitute of branches, not radiculose, pros- 

 trate (zigzag-undulate), 6-10 cm. long, defoliate below ; stems 

 and branches hooked at tips : paraphyllia multiform, mostly long 

 and narrowly linear-lanceolate : lower stem leaves broken, 

 shreddy ; upper loosely appressed and suberispate when dry, erect- 

 spreading when moist, concave, more or less falcate-secund, lightly 

 plicate, folds 2-4, margins broadly recurved to apex ; from a de- 

 current base ovate-lanceolate, acuminate, narrowly and obliquely 

 pointed, entire or serrulate above, 1.9-2.2 mm. long, .7-. 9 mm. 

 wide : costa narrow, yellowish, subpercurrent : cells of stem leaves 

 yellowish at base, smooth, clear, narrow : median cells sublinear 

 vermicular, .005-.007 mm. wide, 4-6 times as long : basal ob- 

 long-rectangular : alar quadrate-oblong : apical linear : branch 

 leaves much smaller, distinctly serrulate above. Dioicous : capsule 

 unknown. 



Type locality, British Columbia ; duplicate of type in Coll. of 

 the Geol. Surv. of Can., no. 93 1 ; collected by Prof. John 

 Macoun on rocks along the Asulcan Creek near a glacier of that 

 name, Selkirk Mountains, alt. 6000 ft., Aug. 7, 1890 ; Can. Muse, 

 no. 564. 



. 4a. Pseudoleskea denudata Holzingeri var. nov. 



In its gametophyte characters this differs from the type in its 

 shorter and diffusely branched stems, in its somewhat smaller and 

 more strongly falcate-secund leaves. Perichetial bracts small, 

 thin, broadly ovate-oblong, abruptly and narrowly acuminate, ser- 

 rulate above, tips spreading-recurved, inner subvaginant, costate : 

 pedicels lightly curved, flattened and twisted above, 10-12 mm. 

 long : capsules broadly oblong-oval, asymmetric, inclined, elon- 

 gated and strongly contracted when dry and empty: urn 1.5—2 

 mm. long, I mm. wide : exothecial cells quadrate to quadrate- 

 oblong, thick walled : exostomial teeth reddish brown, well 

 developed and strongly lamellate, confluent into a purplish red 



band 4 joints wide : endostomial band yellowish papillose, 14 the 



length of the teeth : segments as long as teeth, carinate, open : 



