Evans: TAXILEJEUNEA PTEROGONIA 127 
Taxilejeunea martinicensis Steph. Hedwigia 35: 135. 1896. 
Taxilejeunea debilis Steph. Sp. Hepat. 5: 451. 1913. 
Pale yellowish or whitish green growing in loose mats, often 
pure but sometimes in admixture with other bryophytes: stems 
mostly 0.15—0.2 mm. in diameter, irregularly and usually sparingly 
branched, the branches obliquely spreading usually with smaller 
leaves than the stem: leaves loosely imbricated, the lobe obliquely 
spreading, plane to strongly convex, scarcely falcate, ovate, 
mostly 1-1.2 mm. long and 0.9-1 mm. wide, dorsal margin arching 
across the stem and distinctly auriculate at the base, margins and 
apex of lobe, features of lobule and leaf-cells much as in T. jamai- 
censis; underleaves contiguous to loosely imbricated, convex 
(from below) and often involute, orbicular, mostly 0.06-1 mm. long, 
the basal auricles and margin much as in T. jamaicensis but the 
apical sinus often bluntly pointed to lunulate instead of being 
narrow and acute and the segments usually sharper and sometimes 
tipped with two cells: inflorescence dioicous: 9 inflorescence 
sometimes borne on a short branch sometimes on a more elongated 
branch, innovating on one side, the innovation usually only once 
floriferous; bracts somewhat spreading, keel rounded, lobe straight 
not falcate, ovate to oblong, mostly 0.65-0.9 mm. long and 0.3- 
0.45 mm. wide, acute, often irregularly toothed, the teeth mostly 
sharp and sometimes consisting of single projecting cells, usually 
only three or four, lobule sometimes distinct but often scarcely 
evident, mostly 0.15—0.2 mm. long and 0.05—0.07 mm. wide; brac- 
teole free or nearly so from the bracts, obovate to oblong, mostly 
0.7-0.9 mm. long and 0.45-0.65 mm. wide, bifid about one third 
with a narrow sinus and erect acute divisions, margin crenulate 
and sometimes bearing a sharp tooth on one or both sides; perianth 
more or less exserted, obovoid, mostly 0.75-0.85 mm. long and 
0.45 mm. wide, cuneate toward the base and truncate at the 
apex with a short beak, five-keeled in the upper part, the keels 
crenulate from projecting cells but without wings or teeth: 7 
inflorescence as in T. pterogonta. 
On banks and rocks, more rarely on logs; widely distributed in 
tropical America. The specimens listed have all been personally 
examined by the writer; several of the determinations have 
unfortunately been made from sterile material, but this has usually 
been abundant and in good condition. A few other records for 
the species will be noted later. 
Mexico: without definite locality, F. Liebmann (Underwood 
Herbarium, from Sullivant Herbarium); Orizaba, 1887, C. Mohr 
