Pogonatum.] BRYACE^. 261 



Hedw. Spec. Muse. 96, t. 21. Polytridium tenue, Menz. ; 

 Lindb. Polytrich. 140. 

 Hab. Moist clay banks, Eastern slope of the United States; common. 



2. P. brachyphyllum, Beauv. Plants densely gregarious, 

 olive-green or dark brown when old, arising from a radicular 

 prothalliuui ; stem rigid, very short, 2 or 3 m.m. long : leaves 

 close, the lower very small, squamiform, discolored, the upper 

 much larger, 2 or 3 times longer than the stem, open-spreading, 

 the upper erect, enlarged at the clasping base, oblong-lanceo- 

 late, blunt at the apex, the borders entire ; lamellae inflated on 

 the border : calyptra villous, dirty brown, reaching the middle 

 of the capsule : capsule thick, gibbous, ovate, with a distinct 

 short neck, papillose, yellowish brown, obscurely costate Avhen 

 dry ; pedicel solid, dark red, twisted to the right ; lid convex-con- 

 ical, obtusely apiculate. — Prodr. 84 ; Sulliv. & Lesq. Muse. Bor.- 

 Amer. Exsicc. n. 211; Sulliv. Icon. Muse. 77, t. 48. Foly- 

 trichani bracJujpJiyllum^ Michx. Fl. Bor.-Am. ii. 295; Schwaegr. 

 Suppl. ii. 2. 15, t. 156; Lindb. 1. c. 142. 



Hab. Moist clay banks, New Jersey and Southern States; not rare. 



3. P. capillare, Brid. Plants short, gregarious or loosely 

 cespitose, glaucous-green ; stems slender, mostly simple or 

 loosely foliate : lower leaves distant, small, apj^ressed, gradually 

 longer upward, the comal large, linear from a short sheathing 

 base, sharply serrate on the borders ; lamellae abruptly enlarged 

 at the borders: male ])lants smaller: calyptra hairy, covering 

 the capsule to the base : capsule oblong-cylindrical, erect, 

 papillose, thin, on a slender flexuous and comparatively long 

 pedicel ; lid hemispherical at the enlarged base, abruptly 

 straight-beaked. — Bryol. Univ. ii. 127; Sulliv. Muse. Allegh. 

 n. 115, and Icon. Muse. 79, t. 49. Polytrichum capillare, 

 Michx. 1. c. 294; Lindb. 1. c. Ill and 136. Pogonatum urni- 

 yernm, Drumm. Muse. Amer. n. 284, in part. 



Hab. Northern mountains; White Mountains, Adirondacks, Rocky 

 Mountains, etc. 



4. P. dentatum, Brid. Closely resembling the last species, 

 from Avhich it differs only in the more robust branching stems, 

 the longer capsule with straight not flexuous pedicel, the teeth 

 of the leaves longer, curved outward or backward, the j^erichge- 

 tial leaves numerous (5 or 6), linear-lanceolate, long-pointed 

 above the long ovate sheathing base, and the perigonial leaves 



