1962] 



LEAFY HEPATICAE OF LATIN AMERICA — PART I 



129 



Leaves imbricate, plane to deflexed, asymmetrically ovate to oblong-ovate, 

 nearly straight, 1.5-2.0 mm long, 0.8-1 mm broad at the base, narrowed a 

 little to the transversely truncate, irregularly tridentate apex; teeth mostly 

 large, acute, four to six cells long and broad, the margins entire; leaf-cells 

 thin-walled, the trigones large, with bulging sides, often coalesced, the lumina 

 angular-rounded to stellate, the cuticle slightly verruculose; cells of the apical 

 region 22 X 22 p.. Underleaves approximate to imbricate, subquadrate, broader 

 than the stem, mostly 0.56 mm long X 0.7 mm broad, the lateral margins 

 deeply lobed, the apex distinctly four-lobed, the lobes rounded, mostly three 

 to eight cells long, six to eight cells broad, a slime papilla usually present at 

 the tip of each lobe. Male branches several on a stem, the bracts and bracteoles 

 round-quadrate, bifid or trifid; antheridia occurring singly. Female branches 

 occasional, the bracts of the intermediate and innermost series long-ovate, 

 divided to one-fourth their length into usually three, long, serrulate laciniae. 

 Perianths mostly 5 mm long, the mouth eiliate to laciniate. Fig. 14, a-f. 



Habitat : On trees in forested areas. 



JAMAICA: Fairy Glade, M. Farr 774 (IJ) ; summit of High Peak, M. Farr 907, 911, 

 p.p., 914 (IJ) ; John Crow Peak, Maxon 1240 (YU) ; slope of Mossman's Peak, M. Farr 728, 

 729, 747 (IJ) ; Morce's Gap, Evans 465 (YU) ; New Haven Gap, M. Farr 928 p.p. (IJ) ; 

 slope of Mt. Horeb, M. Farr 950 (IJ). 



PUERTO RICO: s.l., Pagan 283 (NY). 



GUADELOUPE: s.l., VEerminier (type G). 



GUATEMALA: Pitoreal, Sharp 2776b, 2781 (TENN). 



TRINIDAD: Long Stretch, Broadway 6872 (BM). 



COLOMBIA: Rio Apaporis, Raudal Yayacapi, Schultes, Cabrera 4' Sell 15441 (FH) ; 

 Rio Vaupes, Schultes # Cabrera 13856 (FH). 



BRAZIL: Caldas, G. A. Lindberg, type of M. martianvm Lindberg and /. paupercula 

 Lindberg (G, isotype NY). 



VENEZUELA: s.l., Korthals (G). 



15. Bazzania aurescens Spruce, Trans. Proc. Bot. Soc. Edinb. 15: 374. 1885. 



Mastigobryum aurescens Stephani, Spec. Hep. 3: 507. 1908. 

 Bazzania hodkeri var. Spruce ms., Hepat. Sprue. 



Plants of medium size to large, greenish-brown, becoming dark yellow- 

 brown ; stems slender, 6 cm or more in length, with leaves to 3.5 mm broad, 

 prostrate to ascending ; lateral branches infrequent, diverging at a wide angle ; 

 flagelliform branches frequent, long. Line of leaf insertion curved in its upper 

 part. Leaves approximate to sub imbricate, plane, becoming deflexed when dry, 

 asymetrically narrow-ovate to oblong, spreading, 1.5-2.0 mm long, 0.7-0.8 mm 

 broad at the base, narrowed a little to the transversely truncate, tridentate 

 apex; teeth irregular, three to six cells long and broad, acute to acuminate, 

 the sinuses lunulate, the margins usually crenulate ; leaf -cells thin-walled, the 

 lumina angular-rounded to stellate, the trigones large with convex sides, often 

 becoming coalesced, the cuticle faintly verruculose; cells of the apical region 

 24-36 /x long. Underleaves imbricate, subquadrate in outline, broader than the 

 stem, 0.6-0.7 mm long and broad, the apex irregularly incised with unequal 

 teeth and lobes. Female branches occasional, the bracts and braeteoles of the 

 innermost series long, ovate, divided to one-sixth or one-fourth of their length 

 into three eiliate laciniae, the lateral margins dentate to short-ciliate. Perianth- 

 mouth fringed with long cilia. Male branches not seen. Fig. 15, a-f. 



