Aulacomnitnn-. MUSCI. 399 



1. T. megapolitana, Hedw. Stems an inch high or more : leaves deep green, 

 the base whitish, linear-lanceolate, concave, the sides inttexed when dry : flowers 

 monoecious : calyptra often attached to the pedicel or rarely persistent on the capsule : 

 cilia appendiculate. Muse. Frond, i, t. 31 ; Bruch & Schimp. Bryol. Eur. t. 407 ; 

 Fl. Dan. Suppl. t. 47 ; Sulliv. in Gray's Man. 2 ed. t. 3. 



West Humboldt Mountains, Nevada, and in the Wahsatch and Uinta Mountains ( Watson) ; 

 from Arctic America to Washington Territory (Lyall), Colorado and the Atlantic States ; doubt- 

 less to be found in California. 



36. MEESEA, Hedw. 



Densely cespitose perennials, in bogs and swamps, sparingly branched and inno- 

 vating below the flowering apex, densely radiculose. Leaves in several ranks, linear- 

 or long-lanceolate, somewhat clasping and decurrent, with stout costa ceasing at or 

 below the apex ; areolation minute, hexagonal-rectangular. Inflorescence various ; 

 male flowers discoid with clavate paraphyses. Calyptra narrow, cucullate, smooth, 

 fugaceous. Capsule very long-pedicellate, erect-cernuous, clavate with a long collum, 

 incurved, with small oblique mouth, convex-conic operculum, and narrow simple 

 annulus. Peristome as in Bryum, but the outer teeth short and obtuse, the inner 

 narrow and much longer, on a short basal membrane and without ciliolae. 



Four species are known, all European, and three of them also North American. 



1. M. uliginosa, Hedw. Deep green, with a somewhat silky lustre, brown 

 below ; stems | to 1 inch high with as long erect fastigiate innovations : leaves 

 gradually enlarging from the base upward, linear-lanceolate, obtuse, with entire 

 revolute margins : flowers polygamous : capsule reddish brown, with depressed oper- 

 culum and orange-colored peristome. Muse. Frond, i, t. 1, 2 ; Bruch & Schimp. 

 Bryol. Eur. t. 308; Wilson, Bryol. Brit. t. 28; Berkeley, Brit. Moss. t. 16, fig. 7. 



In alpine swamps (Bolandcr, Brewer) ; East Humboldt Mountains, Nevada ( Watson) ; Wash- 

 ington Territory (Lyall) ; from Arctic America to the northern Atlantic States and Colorado, and 

 throughout Europe. 



M. LONGISETA, Hedw., taller (3 to 8 inches high), with broader flat-margined leaves, bisexual 

 flowers, and yellowish peristome, occurs in Oregon or Washington Territory (Pickering) and in 

 the northern Atlantic States. Muse. Frond, i, t. 21, 22 ; Bruch & Schimp. 1. c., t. 309 ; Wilson, 

 1. c., t. 28 ; Sulliv. in Gray's Man. 2 ed. t. 3. 



M. TRISTICHA, Bruch & Schimp. 1. c., t. 311, a still taller direcious species, with broader 

 sharply serrate leaves in 3 ranks, was collected in Washington Territory by Lyall, and is also 

 found eastward. 



37. AULACOMNIUM, Schwaegr. 



Cespitose perennials, on rocks or usually swampy ground ; stems erect, toraentose, 

 innovating at the summit, the branches occasionally naked (pseudopodia) and ending 

 in globose heads of rudimentary leaves. Leaves oblong to linear-lanceolate, costate 

 to the apex, with minute round-hexagonal thick-walled areolation, rather looser at 

 base, often papillose. Flowers dioecious or monoecious, terminal, the male discoid 

 or bud-like, with clavate or filiform paraphyses. Calyptra cucullate, long-beaked, 

 smooth. Capsule long-pedicelled, solitary, somewhat nodding, oblong or ovate- 

 oblong with short distinct collum, striate, sulcate when dry ; operculum convex, 

 mamillate ; annulus compound. Peristome as in Mnium. 



Four species are known, all North American, and three of them also European. 



1. A. androgynum, Schwaegr. In compact tufts, or the fertile more lax, 

 yellowish green ; stems scarcely an inch high ; pseudopodia numerous : leaves linear- 

 lanceolate, spreading, curved or twisted when dry, denticulate at the apex, shortly 



