360 MUSCI. Bruchia. 



and much larger, lanceolate-subulate, with excurrent costa; areolation rectangular 

 below, narrower above : inflorescence monoecious, the male flowers terminal upon 

 special branches, with open perigonium : capsule exserted, ovate with a large solid 

 collurn, beaked : calyptra mitriforrn, lobed or lacerate at base. 



Five species are found in the Atlantic States, two in Europe, and several others in South 

 America and Southern Africa. 



1. B. Bolanderi, Lesq. Stems clustered, simple, scarcely a line long : leaves 

 pale green, erect-spreading, shortly subulate above the lanceolate base, the costa 

 ceasing at the obscurely serrulate apex ; perichaetial leaves broader, nearly tubular, 

 the outer shortly acuminate, the inner lanceolate-subulate, erect, twice or thrice 

 longer than the cauline ; inner perigonial leaves brownish, ovate-lanceolate, acute, 

 obsoletely nerved : calyptra lobed at base : capsule erect or nearly so upon a stout 

 pedicel 2 to 4 lines long, greenish, narrowly oblong with a straight pale beak, upon 

 an elongated pale green collum. Mem. Calif. Acad. i. 5 ; Sulliv. Icon. Muse. 

 Suppl. 23, t. 14. 



Near the Mariposa Grove and at Westfall's Meadow, Bolander. Resembling the European B. 

 Vogesiaca, Schwaegr. 



6. GYMNOSTOMUM, Hedw. 



Low slender cespitose perennials, on rocks ; stems 2 3-dichotomous. Leaves in 

 several ranks, lanceolate to linear, with prominent costa and minute quadrate areo- 

 lation, larger and hyaline at base. Inflorescence monoecious or dioecious, the male 

 terminal and bud-like. Calyptra cucullate, deeply cleft, long-beaked. Capsule 

 erect upon a rather long pedicel, elliptic-ovate or subglobose, with long-beaked oper- 

 culum, annulate (our species), but without peristome. 



Three species are European and North American, with single species in South America and Africa. 

 Differing from Weissia only in the want of a peristome, and referred to it by Mueller and Mitten. 



1. Gr. calcareum, Nees & Hornsch. Very densely cespitose, 2 to 10 lines high, 

 bright green above, ferruginous below : leaves erect-spreading, linear or linear-lanceo- 

 late, somewhat obtuse, minutely serrulate : calyptra very narrow : capsule oblong 

 upon a pale straw-colored pedicel, subcylindrical when empty, pale brownish with 

 a red orifice ; operculum conic with acute or subulate beak ; annulus persistent. 

 Bryol. Germ. 153, t. 10; Bruch & Schimp. Bryol. Eur. t. 32. 



Var. perpusillum, Sulliv. Very small, with erect ovate-lanceolate crenulate 

 leaves, and oval-pyriform capsule. Pacif. R. Rep. iv. 185. 



On clayey soil near San Francisco, Bigelow ; the variety. The typical form was found at Lake 

 Winnipeg by Drummond, and is common in Europe. 



G. CURVIROSTRUM, Hedw. (Muse. Frond, ii. 68, t. 24 ; Bruch & Schimp. 1. c., t. 35, 36), was 

 collected by Bigelow at Leroux Springs at the base of the San Fraiicisco Mountains, Arizona. It 

 is taller (J to 4 inches high) and very much branched, with lanceolate acute and often subserrate 

 leaves : capsule ovate to subspherical, brown and shining, with a broadly conic operculum produced 

 into a long oblique slender beak and long persistent upon the prominent columella. 



7. POTTIA, Ehrh. 



Small terrestrial annuals or biennials. Leaves in several ranks, soft, dull, smooth 

 or papillose, oblong to oblong-obovate, acuminate, the excurrent costa sometimes 

 lamellate on the upper side ; areolation looser and hyaline at base. Flowers monoe- 

 cious, the male axillary, bud-like or naked. Calyptra smooth, cucullate or rarely 

 mitriform. Capsule erect, immersed or exserted, ovate-oblong or truncate-obovate, 

 with depressed-conic obliquely rostrate or obtuse operculum. Peristome none or 

 rudimentary, rarely of 16 entire or bifid teeth. Anacalypta, Roehl. 



