166 BRYACE^. [Orthotrichum. 



Var. parvulum, Sulliv. 1. c. Plants of small size : leaves 

 narrower : capsule 8-striate. — 0. paroidwn, Mitt. Journ. Linn. 

 Soc. viii. 25. 0. Sturmii, Sulliv. & Lesq. Muse. Bor.-Am. 

 Exsicc. n. 117, in part. 



Hab. Dry rocks, in the middle districts ; Uliiah, California ( Bolander) ; 

 the first variety on limestome rocks along the Ohio River {Lesquereux); 

 the second iu New York (Peck) ; the third in Pennsylvania (Porter) ; the 

 last in New Mexico ( Wriylit). 



4. O. Sturmii, Hoppe & Hornsch. Tufts less compact, 

 greenish black or brown : leaves open and recurved when moist, 

 revolute on the whole margin, especially when dry, acutely 

 carinate; upper areolation densely papillose, the basilar rect- 

 angular or vermicular, nodulose near the base, quadrate-equal 

 at the angles : calyptra very hairy : capsule immersed, oval, 

 short-necked, with 8 very obscure striae, slightly constricted 

 under the orifice when dry and empty, and there 8-costate, 

 smooth in the middle ; teeth pale-yellow, not as distinctly 

 punctate as in the preceding, erect, slightly incurved when dry ; 

 cilia none or rudimentary. — Regensb. Flora (1819), ii. 89; 

 Bryol. Eur. t. 209. 



Hab. Rocks, Yosemite "Valley (Bolander); Nevada (Watson). 



5. O. Texanum, Sulliv. Plants large, loosely pulvinate, 

 brown or blackish green : leaves loosely imbricate, erect-oj^en 

 when dry, spreading-recurved when moist, deeply carinate- 

 costate or subplicate from the middle to the apex, linear-lanceo- 

 late ; borders reflexed all around ; upper areolation opaque, 

 punctiform, slightly papillose ; lower cells longer and oblong, 

 pellucid : calyptra long, covering the capsule to the base, very 

 hairy : capsule immei-sed on a short pedicel, oblong-obovate, 

 short-necked, distinctly 8-costate its whole length when dry ; 

 lid with a short straight beak ; teeth 8 and bigeminate, or 16 

 geminate and adjacent in pairs, whitish yellow ; cilia 16, rudi- 

 mentary and rarely seen. — Mosses of U. States, 33, and Icon. 

 Muse. 53, t. 34 ; Sulliv. & Lesq. Muse. Bor.-Amer. Exsicc. n. 

 122 (excluding diagnosis). 



Var. globosum, Lesq. Stems shorter: leaves erect when 

 moist: capsule shorter, globose, emergent upon a somewhat 

 longer pedicel, with a brown shining calyptra. — Mem. Calif. 

 Acad. i. 17. 



Hab. Texas (Wright); New Mexico (Fendler); on rocks, California 

 (Bolander); Colorado (Wolf & Bothrock). 



