— 298 — 



colored larger cells, smooth; other cells as in the last; costa 

 percurrent or scarcely excurrent. Capsules unknown. Stem 

 divided. Tufts dense, brown-ferruginous below, green at the 

 tips, about 3 cm. high. Habit of Barhula ruralis. — Wet 

 rocks r. Amer. Pacif. distr. Can. Vane. isl. »U. S. Calif. » 

 C. M. herb. 



Fam. 27. OrthotrJchaceaB. 



125. Orthotrichum Hedwig. 

 A. Stomata of capsule superficial. 



a. Leaves partly or wholly involute, not carinate. Dioe- 

 cious. 



I. Coelophyllum. Leaves short concave obtuse; cells gen. 

 short. Capsule immersed sulcate strangulate when dry; calyp- 

 tra scabrous; teeth reflexed when dry, broader than the cilia. 



h. Leaves gen. carinate and recurved nearly all around, 

 not crisped. Monoecious or (0. exiguum) dioecious. 



II. Dorcadion. Capsule r. strangulate; calyptra us. hairy. 

 aa. Capsule narrow siibcylindric not distinctly constricted, 



us, exserted. 



1. Speciosa. Capsule nearly smooth at least when young; 

 ciUa narrow; teeth us. opake and connate in pairs. Leaves 

 carinate gen. long. 



bb. Capsule thick oval-oblong strangulate and sulcate, us. 

 immersed; cilia narrow. 



2. Arctica. Leaves short often subcanaliculate, us. obtuse. 



3. Affinia. Leaves long carinate us. acute. 

 cc. Capsule thick suboval not strangulate. 



4. Rnpestria. Capsule immersed or emergent, more or 

 less sulcate; teeth erect or patent when dry, joined in pairs 

 but us. subpartite; cUia narrow. Leaves long carinate. 



5. Leiocarpa. Capsule wholly or partly immersed, not 

 sulcate; cilia very broad; teeth not connate. Leaves sometimes 

 short and nearly fiat at borders. 



c. Leaves faintly or not carinate, partly recurved or wholly 

 flat at borders, us. long and crisped. Sometimes dioecious. 

 ni. Lyellina. Capsule us. immersed; cilia somewhat broad. 

 Leaves not or faintly crisped; alar cells not hyaline. Dioecious, 

 often (in Europe) with propagula when sterile. 

 IV. TJlota. Capsule exserted; ciUa narrow. Leaves more or 

 less distinctly crisped; alar cellfi mostly pluriseriate and hyaline. 

 Tufts us. pulvinate. Monoecious. 



