Orthotrichum.] BRYACE^. 165 



lanceolate, revolute on the borders, distinctly papillose ; basi- 

 lar areolation rectangular, the upper round-hexagonal : calyptra 

 dirty brown, hairy : capsule exserted on a comparatively long 

 pedicel, ovate-oblong, indistinctly 16-striate, constricted in the 

 middle when dry ; teeth light yellow, erect when dry ; cilia 

 none or rudimentary. — Muse. Frond, ii. 102, t. 37 ; Bryol. 

 Eur. t. 210. O. saxatile, Brid. Bryol. Univ. i. 275. 



Hab. On limestone rocks; Niagara Falls; Salem, Mass.; Ontario, 

 Canada; Rocky Mountains, etc.; rare. A doubtful form from the 

 Washoe Mountains, Nevada {Watnon), with thicker more papillose and 

 more revolute leaves, closer areolation, and more pilose calyptra, is men- 

 tioned by James (Bot. King Exp. 402; Bot. Calif, ii. 383). 



2. O. Isevigatum, Zett. Like the last in size and aspect, 

 differing in the very hairy calyptra, the capsule not striate and 

 perfectly smooth when dry, the teeth very papillose and more 

 closely articulate, with rudimentary cilia, and in the narrower 

 basal cells of the leaves. — Schimp. Bryol. Eur. Suppl. t. 2 ; 

 James, Bot. King Exp. 402. 



Hab. Pah-Ute Mountains, Western Nevada ( Watson). 



3. O. cupulatum, Hoffm. Growing in more or less dense 

 tufts, of a dirty green or brownish color : leaves close, spread- 

 ing when moist, oblong-lanceolate, reflexed on the borders ; 

 cells very small toward the apex : calyptra campanulate, shorter 

 and broader than in 0. anonialum, slightly hairy, pale reddish 

 brown: capsule half-emergent, globose-ovate, short-necked, 16- 

 striate, the striffi more or less dark yellow and alternately short 

 and longer, IG-costate and urceolate when dry and empty ; 

 lid pale yellow, deep orange at base, short, straight-beaked from 

 its convex base ; teeth 16, free to the base, pale yellow, spread- 

 ing star-like when dry. — Deutschl. Fl. ii. 26 ; Bryol. Eur. t. 209. 



Var. minus, Sulliv. Plants short, closely pulvinate, black- 

 ish green : leaves more distinctly revolute on the borders, some- 

 what narrower : capsule shorter. — Icon. Suppl. 61, t. 44. 0. 

 Lescurii, Aust., Muse. Appal, n. 163, and Bull. Torr. Club, vi. 

 341. 



Var. Peckii, Sulliv. 1. c. Capsule subovate, 8-striate : calyp- 

 tra distinctly hairy. — 0. Peckii^ Aust., Muse. Appal, n. 162; 

 Peck, Rep. N. Y. Univ. (1873), xxv. 71. 0. cupulatiim (?), 

 Drumm. Muse. Amer. (Coll. II.) n. 81. 



Var. Porteri, Sulliv. 1. c. Capsule 8- (rarely 16-) striate, 

 longer-pedicellate. — 0. Porteri, Aust., 11. cc, n. 161, and vi. 341. 



