BAENES — NOKTH AMEEICAN MOSSES. 235 



BRACHYTHECIUM, p. 334. 

 I. Seta smooth. 



[S. nanopes and S. mirahundum may be sought here.] 



* Cilia rudimentary or none. 



Perichaetial leaves costate .... B. acnminatum,^ 336. 



Perichaetial leaves ecostate. 



Inflorescence synoicous B. Utahense, 339, 



Inflorescence dioicous or monoicous. 



Capsule oval, cilia none B. Donnellii, 338. 



Capsule cylindric oblong. 

 Leaf costate to middle, basal cells very small B. biventrosnin, 338. 

 Leaf costate % the length, basal cells dilated B. IffiTisetnm, 469. 



* * Cilia well developed, appendiculate. (* * *) 



Perich»tial leaves abruptly long pointed . . . B.lse turn,' 335. ^ 

 Perichsetial leaves gradually long pointed . . B. Mildeannm,' 337. ' 



* * * Cilia well developed, not appendiculate. 



Annulus compound B. collinnm, 339. v 



Annulus simple, narrow. 

 Leaves acute or acuminate, serrulate. 

 Leaves straight when dry, capsule short (1-1.5), mo- 

 noicous B. salebrosnm,* 336. 



Leaves twisted flexuous when dry, capsule short, 



(1:1.5-2) B. Thedenii, 338. 



Leaves acute or acuminate, entire or slightly serrate at apex only. 

 Open, alar cells oblong. 



Monoicous B. salebrosnm,^ 336. ' 



Dioicous B. glareosum, 4^8. i 



Appressed imbricate, alar cells quadrate . . B. albicans,^ 337. ^ 



1 See Appendix, nos. 155, 156. 

 ' See Appendix, nos. 450-452. 



' J3. Mildeanum Soh. = B. salebrosum palustre L. & J. = J5. acutum Mitt,, sec. Ren. 

 & Card. Rev. Bry. 30: 17. 1893. 

 < See Appendix, nos. 461, 462, 463. 

 ' See Appendix, no. 459. 



