of the Tribe Trigonanthee. 17 
Bazzania emarginata (Steph. ). 
Mastigobryum Didericianum, var. emarginatum Steph., Hedwigia, xxiv, 249, 
1885. 
PuaTEe IV; FIGURES 14-27. 
Plants yellowish brown, growing in loose tufts on the trees and on 
the ground, often mixed with other hepatice ; stems very slender, 
sparingly branched, often pendulous ; flagella scattered, very slen- 
der: leaves distant, rarely approximate, spreading, subfalcate, lan- 
ceolate, antical base arching about half way over the stem, postical 
base not decurrent, apex bidentate or emarginate, teeth subulate, 
divergent or parallel, 3 to 6 cells broad, 4 to 12 cells long, ending in a 
row of 2 to 6 cells, antical tooth often longer than the postical; sinus 
acute or obtuse : underleaves distant or approximate, twice as broad 
as stem, broadly ovate, base slightly curved, apex truncate, retuse or 
erose-dentate : leaf-cells at apex large, thin-walled, cavities stellate, 
pits long, trigones large, sometimes confluent, cells at margin small, 
elongated, perpendicular to edge, at the middle of the base oblong, 
trigones large, often confluent ; at middle of underleaf similar to 
those of leaf: ¢ inflorescence borne on a short branch; bracts in 
about three rows; innermost bracts ovate, the upper portion den- 
ticulate, apex bifid to quadrifid, lobes subulate, denticulate at the 
base, 2 to 4 cells broad, 5 to 8 cells long, ending in a row of 3 to 5 cells; 
innermost bracteole similar to bracts; bracts of second row ovate 
sparingly denticulate, bifid, teeth 2 to 4 cells long, 2 to 4 cells broad; 
bracteole similar to bracts ; perianth ovoid-cylindrical, terete below, 
many keeled above, 2 cells thick near base, mouth contracted, irreg- 
ularly lobed, lobes laciniate, laciniz 2 to 4 cells broad, 4 to 7 cells 
long, ending in a row of about 4 cells: capsule oval, purplish brown; 
spores brown, verruculose: ¢ spike occupying a short postical branch; 
bracts in about 6 pairs, concave, broadly ovate, apex irregularly den- 
tate, teeth 1 or 2 cells long, 1 or 2 cells broad; bracteoles much smaller, 
broadly ovate, apex emarginate, lobes triangular, rounded ; anther- 
idia borne singly. 
Stems 0.277 in diameter; leaves 1.3™ long, 0.25™™ broad at 
apex, 0.5™" broad at base ; underleaves 0.45™™x0.4™™, leaf-cells at 
apex 33, at middle of base 57px28p, at antical edge 20ux31p, at mid- 
dle of underleaf 45x30; innermost bract 1.2"™x0.65™"; bract of 
second row 0.75""x0.45™™" ; outermost bract 0.25"™x0.25™"; perianth 
2.4™™x1.0™™; ¢ bracteole 0.2577x0.3""; spores 22m. 
Trans. Conn. Acav., Vou. XII. 2 May, 1904, 
