— 397 — 



acuminate, often obtuse; costa abbreviate or scarcely percurrent. 

 Capsule exserted; pedicel nearly immersed. Spores as in the 

 last. — Amer. r. »U. S.»: Mrs Britton. 

 ll.B.Hallii Austin; Britton 1. c. 



Upper leaves subovate very short-acuminate acute; costa per- 

 current. Capsule wholly exserted; pedicel nearly emergent at 

 apex. Spores large papillose. — Amer. r. »U. S. »: Mrs E. G. 

 Britton. 



lt>. Leaves long-acuminate. Spores somewhat large, us. very 

 papillose. 



12.B.texana Austin; Britton 1. c. — B. flexuosa var. nigricans 

 SuU. 1. c. 



Upper leaves from ovate-oblong base abruptly subulate-acu- 

 minate, entire. Capsule wholly exserted, longer than the thick 

 neck; pedicel subemergent. — Amer. U. S.: com. Macoun. 



* JS.Donnellii Austin; Lesq. et Jam. 



sLeaves sinuolate above, sometimes faintly papillose. Pedicel 

 often emergent. — Amer. r. U. S.»: Lesq. et Jam. 



* B.SulliTantii Austin; Lesq. et Jam. — B. ilexuosa Sull. 1. c, 

 in part. 



Capsule partly emergent. Spores larger, more papillose. — 

 Amer. r. »U. S.»; SuUivant. 



IS.B.flexuOsa Schwagrichen. — Phascum Schw.; Bruchia C. M.; 

 B. Beyrichiana Sull. 1. c. 



Upper leaves from ovate-oblong base nearly gradually narro- 

 wed to the linear- subulate by the (not excurrent) costa nearly 

 filled acumen. Capsule oval piriform without distinct neck, 

 partly emergent; pedicel not shorter. — Amer. r. U. S.: Lang- 

 lois, com. Cardot. 



161. Pleuridium Bridel. 

 A. Monoecious with gemmiform male flowers. 



a. Branches julaceous. Leaves obtusate or short-acuminate; 

 upper cells small rhomboidal. 



l.P.Sullivantii Austin. — »P. nervosum » Sull. icon, m., non 

 Brid. 



Leaves subovate crowded: upper with thick excurrent costa, 

 perichetial abruptly acuminate much larger. Capsule broad-oval 

 thick-pointed; pedicel nearly half as long. — Amer. i. »U. S.»: 

 Sullivant. 



b. Branches not julaceous. Leaves long-acuminate; the upper 

 larger; cells rectangular. 



