1968] 



LEAFY HEPATICAE OF LATIN AMERICA PART III 



355 



segments short-triangular, the sinus broad, lunulate; cells large, without conspicuous 

 trigones, occasionally showing a suggestion of weak bands of thickening over the 

 surface. Underleaves absent. Plants dioicous. Male inflorescence terminal becoming 

 intercalary on the stem or on a branch, the bracts slightly smaller than the leaves, 

 pouched, the bracteoles absent. Female inflorescence on a short ventral branch, 

 large, "bushy," the bracts and bracteoles in 4-6 series, deeply bi-, tri-, and quadrifid, 

 the segments long, narrow. Perianth brown, long, tubular with 3 weak keels above, 

 the mouth broad, appearing truncate, irregularly setulose and ciliate, the cilia 1-4 

 cells long. 



Type species: Alobiella pulvinata Stephani, 1908. 



Key to the Species 



Margin of the upper half of the leaf strongly crenulate ; cells of the margin mostly 



39 ii high, 39-52 wide; 1. F. biloba. 



Margin of the upper half of the leaf entire or with weak crenulations ; cells of the 



margin mostly 26 /x high, 52-65 /x wide. 2. F. pulvinata. 



1. Fuscocephaloziopsis biloba (Herzog) Fulford, comb. nov. 

 Alobiella biloba Herzog, Repert. Sp. Nov. 57: 166. /. 5, e-l. 1955. 



Plants of medium size, coarse, yellow-green, prostrate in mats or creeping among 

 other bryophytes; stems 1-2 cm long, with leaves, to 1.5 mm wide, irregularly 

 pinnate, the branches rare or frequent, ventral-intercalary, leafy, occasionally short 

 and bearing a female inflorescence. Stems somewhat flattened, with two or three 

 dorsal rows of large cortical cells between the row of leaves; stem in transverse 

 section brown, the cortical layer of about 10 very large cells surrounding the medulla 

 of numerous smaller, thick-walled cells with trigones and narrow pits. Rhizoids 

 numerous, from cells of the ventral side of the stem. Leaf insertion nearly longi- 

 tudinal. Leaves widely spreading, slightly decurved, subimbricate, 1.0 mm long, 0.8 

 mm wide, broadly ovate, bilobed to one-fourth their length, the segments short- 

 triangular, mostly erect, with conspicuously crenulate margins, the ventral base 

 decurrent, the sinus lunulate, the dorsal margin convex above a straight base; cells 

 of the upper part of the leaf 78-100 X 50-65 /u., the walls light brown, uniformly 

 thickened, the trigones tiny, the cuticle smooth. Underleaves absent. Plants dioicous. 

 Male inflorescence terminal on the stem or on a short ventral branch; bracts in to 

 10 or more pairs, similar to, and nearly as large as the leaves, ascendant, folded, 

 pouched. Female inflorescence on a short branch, the bracts and bracteoles in 4-6 

 series, the innermost bracts quadrifid to nearly one-half their length. Perianth long, 

 the mouth setulose and ciliate, the cilia to 4 cells long. 



PI. 93. Fig. 1, a-h. 



Habitat: In mats on trunks of trees. 



TRINIDAD: s.l., Cruger (6) (NY); Mt. Aripo, Simmonds 173 (?) (MICH). 

 COLOMBIA: El Valle: Cordoba, Dagua Valley, 80-100 m, Killip 5248 ($, $) (type Hb 

 Herzog, US), same locality, Killip 11784 (?) (US). 



2. Fuscocephaloziopsis pulvinata (Stephani) Fulford, comb. nov. 

 Alobiella pulvinata Stephani, Spec. Hep. 3: 356. 1908. 



Plants of medium size, coarse, yellow-green becoming brown, prostrate, in mats 

 or among other bryophytes. Stems 1-2 cm long, with leaves, 1.0-1.5 cm wide, rarely 

 branched, the branches ventral-intercalary, leafy, occasionally short and bearing a 



