348 BRYACE^. [Ili/pnum. 



branchlets more or less distinct, sometimes secund, minutely 

 serrate all around, narrowly costate to above tlie middle, con- 

 cave at the angles ; areolation very close and narrow, tlie alar 

 yellow; periclitetial leaves sheathing at base, abruptly narrowed 

 into a long slender recurved flexuous point, the inner only 

 thinly costate : capsule cei-nuous or subhorizontal by the curv- 

 ing of the pedicel, oval-oblong; operculum short-rostrate; cilia 

 sliorter than the segments; annulus large. — Spec. PI. 1130. 

 Isothecium mi/osnroides, Brid. Bi-yol. Univ. ii. 369 ; Bryol. Eur. 

 t. 534. Eurhyncldam myosuroides, Schimp. Syn. 549. 



Hac. On trees; Nova Scotia (James); White Mountains (Oakes); 

 California [Bolander, Watson); Oregon [Hall). 



63. H. stoloniferum, Hook. Ramification as in the last, 

 the plants generally larger ; branch-leaves more crowded, densely 

 imbricate when drj', more elliptical, minutely pa])illose on the 

 back, costate beyond the middle, more distinctly serrate : cap- 

 sule drooping; cilia as long as the segments. — Muse. Exot. 

 t. 74 ; Mitt. Journ. Lhm. Soc. viii. 34; Lesq. Mem. Calif. Acad, 

 i. 31 ; Sulliv. & Lesq. Muse. Bor.-Am. Exsicc. (ed. 2), n. 425, 

 Isothecium stoloniferum, Brid. 1. c. 371. M. mijosuroides, var. 

 stoloniferum, Muell. Syn. ii. 500. 



Hab. Cojnmon on trees upon the Pacific Coast, from California to 

 Alaska (Fort Colville, Watson), and very variable. The species varies 

 even upon the same tuft, according to degree of exposure to fog and wind. 

 The characters of the next five species cannot be considered permanent. 



64. H. spiculiferum, Mitt. Leaves (below the peri- 

 choetium) lanceolate-acuminate from a cordate-ovate base, 

 smooth, nerved for three-fourths of the length, the borders 

 reflexed 1»elow, serrulate above ; upper leaves narrower, papil- 

 lose on the back, those of the branchlets elliptical-lanceolate, 

 very acute, concave, acutely papillose on the back, the costa 

 denticulate at the apex, and the borders plane and serrulate; 

 perichaetial leaves erect, oblong at base, serrulate, recurved 

 above, costate to above the middle: capsule short-pedicelled, 

 oblong, subsymmetrical, horizontal ; operculum conical ; seg- 

 ments cleft between the articulations; cilia solitary. — Journ. 

 Linn. Soc. viii. 34. 



Hab. British Columbia (Lyall, Douf/las). 



Habit of H. myosuroides, with the branchlets more attenuated and 

 more curved, and the whole plant a little larger. It appears to differ from 

 II. stoloniferum in its more slender habit, more abundant papillaa on the 



