116 BEYACE.E. [Barbula. 



2. B. rigida, Schultz. Dioecious : leaves spreading from an 

 erect base, oblong, obtuse or apiculate, rarely hair-pointed : 

 calyi^tra long-rostrate, reaching the middle of the capsule : cap- 

 sule elliptical-oblong ; lid long-beaked ; teeth long, twice 

 twisted ; annulus broad, revoluble. — Recens. Barb. 196, t. 32 ; 

 Bryol. Eur. t. 137. Tortula stellata, Lindb. Trichost. 233. 



Vars. mucronulata, and pilifera, Schimp. Upper 

 leaves mucronate, or hair-pointed. — Syn. 164. 



Hab. Kocky Mountains, Colorado {E. Hall). Var. mucronulata on 

 Guadalupe Island, Lower California (Palmer). 



3. B. ambigua, Bruch & Schimji. Dioecious : plants 

 somewhat longer : leaves expanded star-like from an ovate 

 base, linear-lanceolate, blunt at the apex, reddish on the back : 

 calyjitra shorter, scarcely reaching the base of the short-beaked 

 lid: caj^sule cylindrical-oblong, furrowed when dry; teeth 

 longer, twisted once or a little more, incurved when dry. — - 

 Bryol. Eur. t. 139. B. rigida, Hedw. Muse. Frond, i. 65, t. 25, 

 excl. j)eristome. Tortula ambigua, Angstr. ; Lindb. Trichost. 

 235. 



Hab. On the ground, near Athens, Illinois (JF. Hall). 



§ 2. CiiLORONOT^. — Plants perennial, cespitose : leaves broad 

 and thin, not incurved on the borders,' costa round, fila- 

 mentose above : teeth of the peristome closely tvnsted ; 

 basilar membrane short, tubulose. 



4. B. membranifolia, Scliultz. Monoecious : the plants 

 longer, in thick small tufts, hirsute with white hairs upon the 

 leaves, interwoven with radicles : leaves open-erect, broadly 

 ovate and oblong, lanceolate, very concave, the areolation irre- 

 gularly rhomboidal at the denticulate apex ; costa excurrent 

 into a long white hair : male flowers near the base of the peri- 

 chjBtium, monophyllous or diphyllous : calyptra reaching to the 

 middle of the ovate-elliptical erect or slightly curved capsule ; 

 lid narrow, short-beaked ; teeth thrice twisted ; annulus simple. 

 — Recens. Barb. 226, t. 34 ; Bryol. Eur, t. 140. Tortida mem- 

 branifolia. Hook. Muse. Exot. t. 26. Tortida squamigera, 

 DeNot. ; Lindb. Trichost. 235. 



Hab. Western Arizona, near the mouth of Santa Maria Creek (Bige' 

 low)', Rocky Mountains {E. Hall). 



5. B. chloronotos, Bruch. Dioecious: plants short, 

 closely cespitose : leaves close, imbricate when dry, spreading 



