LEAFY HEPATICAE OF LATIN AMERICA— PART I 



cordate base, the ventral auricle large, undulate, sometimes lobed, the margin 

 entire to serrulate; leaf-apex broad, rounded or undulate to 3-lobed or -toothed, 

 the lobes or teeth broad, short, the sinuses broad, lunulate, the margins entire ; 

 leaf-cells thin-walled, the Lumina angular-rounded, the trigones small, conspicu- 

 ous, sometimes becoming coalesced, the cuticle smooth to faintly verruculose; 

 cells of the apical region averaging 16-20 p.. Underleaves approximate to sub- 

 imbricate, subquadrate to longer than broad, 1.5-2 mm broad, the base strongly 

 cordate, the auricles large, overlapping or nearly so, the margins entire, undu- 

 late, the lateral margins convex, the apical margin rounded, undulate, slime 

 papillae present in the depressions. Sexual branches and sporophyte not seen. 

 Fig. 49, a-c. 



Habitat: Tu deep tufts on tree trunks and branches in forests. 



ECUADOR: Canelos, Spruce, Hep. Sprue, (isotypes FH, G, NY), Spruce, Hep. Sprue., 

 type of B. rinceniina v;ir. subedeniala (isotype NY). 



50. Bazzania placophylla (T. Taylor) Grolle, Rev. Bryol. Lichenol. 27: 54. /. 1-5. 



1958. 



Jungrrmannia placoplii/lla T. Taylor, London Jour. Bot. 5: 276. 1846. 



Plants large, in deep olive-green to yellow-brown tufts; stems large to 10 

 cm or more long, with leaves to 3 mm broad ; lateral branches scarce, diverging 

 at an acute angle; flagelliform branches not seen. Leaves approximate to 

 slightly imbricate, spreading, the sides nearly parallel, rounded at the broad 

 apex, averaging 1.5 mm long, 0.95 mm wide, the margins entire, the dorsal 

 margin arched from a cordate base and hook-form insertion, extending across 

 the stem and beyond, the ventral base only a little dilated, the small auricle 

 undulate; cells appearing in rows in the upper part of the leaf, averaging 18 p., 

 thin-walled, the trigones large with convex sides, coalesced or separated by thin- 

 walled pits, the lumina angular-rounded to stellate, the cuticle roughly verru- 

 culose. Underleaves approximate to imbricate, very large, round-quadrate to 

 longer than broad, averaging 1.1 mm across, the base straight to the line of 

 insertion or rounded or slightly cordate-auriculate, the lobed margin entire, the 

 cells as in the leaf. Sexual branches, and sporophytes not seen. Fig. 50, a-e. 



Habitat : "Mountain slopes on the east side of the Cordilleras of Peru." 

 ECUADOR: Quito, Jameson 12 (BM). 



PERU: "East declivity of the Cordilleras of Peru" Jameson (type S-PA, isotype W). 



51. Bazzania macrostipula Fulford, Bull. Torrey Club 86: 407. /. 107-112. 1959. 



Plants large, olive-green becoming yellow-brown in the older portions ; stems 

 to 10 cm or more in length, to 6 mm broad; lateral branches rare, diverging at 

 an acute angle; flagelliform branches not seen. Leaves imbricate, spreading, 

 often becoming somewhat deeurved near the tip, tending to be asymmetric, 

 the ventral margin nearly straight, broadly ovate, to 3.5 mm long, 2 mm broad 

 at the base, narrowed to 0.5 mm at the truncate, usually tridentate apex, the 

 dorsal margin strongly arched from a cordate base and hook-form insertion, 

 extending across the stem and beyond, the ventral base enlarged, forming an 

 auricle with several teeth and long appendages, often recurved, the leaf margins 

 obscurely serrulate here and there; teeth equal or with the basiscopic tooth 

 smaller, mostly ten to twelve cells long and broad at the base, the tip a spine of 



