musci. (mosses.) 657 



1. Ii. jlllaceilS, Sulliv. Branches 8" -10" high; leaves appressed, when 

 dry recurved, horizontal when moist, ecostate, revolute on the margins ; areola- 

 tion minute, oval-rotund ; perichsetial leaves as long as the pedicel. — Trees, 

 Middle States, in districts not mountainous. (Tab. 18.) 



2. L«. bi'iichypus, Brid. Very like the preceding ; branches more 

 elongated (li'-2' long), recurved; leaves longer, when dry secund; operculum 

 longer-rostrate ; pedicel shorter ; perichsetial leaves overtopping the capsule. — 

 Alleghany Mountains. 



63. LEPTODOIV, Mohr. (Tab. 18.) 



Calyptra dimidiate, large, hairy. Operculum conic-rostellate. Capsule ovate- 

 oblong, its pedicel concealed by the large perichaeth. Peristome double ; the 

 exterior 16 linear acuminate whitish teeth, more or less fissile along the medial 

 line ; the interior a membrane lining and bordering the teeth. Inflorescence 

 dioecious. — Rather stiff Mosses, with prostrate filiform naked stems, and crowd- 

 ed mostly simple and pinnated branches, densely clothed with oblong-ovate 

 leaves, having a dot-like areolation. (Name composed of Xenros, narrow, and 

 68a>v, a tooth.) 



1. L,. tl'icIlOlllitrion, Mohr. Main branches l£'- 2' long; leaves when 

 moist erect-patent, ecostate, reflexed on the margins ; the perichsetial leaves 

 long as the pedicel. — In woods; forming elastic masses on the trunks of trees, 

 sometimes on rocks ; Northern and Middle States. 



2. L.. illimei'SMUl, Sulliv. & Lesqx. (Muse. Bor.-Amer., No. 234.) 

 Somewhat smaller than the preceding ; leaves not so crowded, more suddenly 

 acuminate ; capsule urccolate-oblong, its mouth larger ; articulations of the 

 teeth of the peristome closer; perichaetial leaves concealing (besides the pedicel) 

 the larger portion of the capsule. — Trees, Southern States. 



3. L.. Ohioeiise, Sulliv. Much like No. 1 ; but stems more slender and 

 elongated, less regularly pinnate ; leaves when moist spreading horizontally, the 

 costa extending to the middle. — Trees, Central Ohio. (Tab. 18.) 



64. ANTITRICHIA, Brid. (Tab. 18.) 



Calyptra cucullifbrm. Operculum conic. Capsule oval, exannulate, with a 

 flexuose-arcuate pedicel. Peristome double; the exterior 16 lanceolate-subulate 

 teeth; the interior 16 subulate fugacious cilia. Spores large. Inflorescence 

 dioecious. — A large Moss with distantly subpinnate and flexuous ascending or 

 pendulous stems, and crowded broadly ovate-acuminate scmi-costate leaves ; the 

 perichsetial elongated and sheathing. (Name from dirt, opposite, and Tpi%ioi>, 

 a little hair, the cilia erroneously supposed to be opposite the teeth.) 



1. A. curtipoisdulti, Brid. Leaves ciliate-serrate at the apex, recurved 



on the margins, plicate with 4-5 short costse at the base, the central one extend- 

 ing beyond the middle ; cellules minute, those at the basal angles oval, disposed 

 in oblique lines, elsewhere olilong. — Summit of Black Mountain, North Caro- 

 lina, Lesquereux. (Tab. 18.) (Eu.) 



