40 MUSCI. (MOSsES.} 
like, broad-ovate, — cut and long-ciliated on the margins, not costate, loose 
ly reticulated. (Named after J. C. Buxbaum, an early German botanist.) 
1 aphjlla, Haller. Stem and leaves having the appearance of a 
minute sity bulb, many times smaller than the capsule with its short cylindri- 
cal apophysis; pedicel rather stout, 7/’~10” high, tuberculate.—— New En gland 
and New York; rare. (Tab. 17.) (Eu.) 
42. DIPHYSCIUM, Weber& Mohr. (Tab. 17.) 
root te eons ‘gpa entire at the base, scarcely covering the wen 
culum. Capsule large, ovate, oblique, gibbous, subsessile, immersed. eri- 
stome ieabie iy: ; the exterior a very narrow cai dentate ring, “ala rudi- 
mentary ; the interior as in Buxbaumia. Inflorescence dicecious : male flower 
terminal, gemmiform ; antheridia numerous, serena nee bulb-like 
mosses, annual or biennial, the sessile capsule forming the principal part; stem 
very short, its leaves lingulate, spreading, entire, costate, thick and fleshy; the 
petichztial leaves much larger, membranous, erect, lanceolate, ciliate-lacerate at 
the point, the costa exeurrent into a long serrulate awn. (Name from dis, 
twice, and puoxiov, a vesicle; the wide separation of the thecal and sporangial 
membranes giving the appearance of one vesicle within another.) 
1. D. folidsuma, Web. & Mobr. Whole plant 3-4" high. — Clayey ot 
barren soil; not unfrequent in hilly districts. (Tab. 17.) (Eu 
Tre XVI. POLYTRICHEZ. 
43. ATRICHUM, Beauv. (Tab. 17.) 
Calyptra iota cuculliform, naked, spinulose at the apex. Operculd 
hemispherical at the base, with a long slender rostrum. Capsule cylindrical or 
oblong, nearly erect, slightly arcuate, ek -pedicellate. Peristome single: tect 
32, enots, ligulate, obtuse, incurved and Syoepie = their roucaunetes to the kit? 
leaves small below, much larger and elongated above, crisped when dry, of 4 
minute firm hexagonal areolation, the percurrent costa bearing on its upper sur 
face 2 or 3 narrow lamella. — (Name from a privative, and Opié, rptxds, « hair, 
in allusion to the naked tra.) 
ndnlat Be: Stems erect, mostly simple; leaves long 
Tgnate lanceolate undulate, spinulose-toothed, narrowly margined, the ¢cost® 
cs with 2-4 narrow lamelle. (Catherinea undulata, Brid. )— Moist clay-banks, 
in hilly distri rare. — Moneecious : fertile flower terminal on a prolongation 
of the axis oy the sterile ae ba 
2. A. angustatum, More slender than the preceding ; leaves 
narrower, more densely eda not denticulate below the middle, the cost® 
with more numerous and broader Jamelle.— Shady woods, and center 
_. SWamps ; commot..-— Dicecious : male flower terminal. " (ab. 17.) Eu.) 
