—29— 
with colorless rhizoids, mostly 3-5 mm. long and 0.15-0.2 mm. in diameter, 
sparingly branched, the branches soon becoming separated as distinct individ- 
uals; leaves at first loosely to closely imbricated, often becoming scattered with 
age, unequally complicate-bilobed to about the middle; dorsal lobe suberect to 
obliquely spreading, ovate, when well developed 0.65-0.85 mm. long and 0.4- 
0.45 mm. wide, but sometimes considerably smaller, almost transversely attached 
and not decurrent, broad and rounded at the apex, entire; ventral lobe widely 
spreading, ovate to oblong, when well developed 1-1.15 mm. long and 0.5-0.6 
mm. wide, attachment and apex similar to those of the dorsal lobe, margin 
usually entire throughout but sometimes with vague indications of minute 
rounded projections close to the base; keel sharp, straight or slightly incurved; 
leaf-cells with slightly thickened walls and (in the middle of the lobes) vaguely 
defined trigones having concave bides, averaging about 10^ in width along the 
margin of the ventral lobe, 22 x 15^ in the median portion and 30-60 xiS[L toward 
the base, no distinct median band of elongated cells being differentiated; cuticle 
smooth or with very faint verruculae: inflorescence autoicous: cT inflorescence 
at first terminal on a more or less elongated axis, then proliferating vegetatively; 
bracts mostly in four to six pairs, at first imbricated, similar to the vegetative 
leaves but with more or less strongly arched keels; antheridia borne singl> : Q 
inflorescence borne on a more or less elongated branch arising just below a in- 
florescence, the vegetative leaves mostly in two to four pairs, increasing in size 
upward; bracts mostly in one or two pairs, simi'ar to the vegetative leaves but 
larger and with both lobes obliquely spreading to suberect, the dorsal lobe 
measuring about 1.35 x 0.75 mm. and the ventral about 1.5 x 0.85 mm.; perianth 
about half exserted or slightly more, oblong to obovate in outline, mostl> 2-2.5 
mm. long and 0.9-1 mm. wide, somewhat compressed, irregularly about ten- 
plicate in the upper part, the folds and grooves being rounded, but often narrow 
slightly contracted at the mouth and irregularly toothed, the teeth sharp, mostly 
one to five cells long and one to four cells broad at the base, some of the larger 
teeth bearing smaller secondary teeth on the sides: mature sporophyte and 
gemmae not seen. [Plate i, Figs. i-ii]. 
The writer takes pleasure in naming this well-marked species in honor of 
its discoverer, Professor A. Le Roy Andrews of Cornell University, President of the 
Sullivant Moss Society. The material collected is not abundant but is sufhcient 
to bring out clearly the distinctive features of the plant. 
Although in most cases the lobes of the leaves are plane or nearly- so, they 
are sometimes more or less concave when viewed from above. This is especially 
likely to be the case with the ventral lobes, the margins of which may even be 
slightly involute. The Verruculae, which are sometimes to be observed on the 
cuticle of the leaf-cells, are exceedingly pale and inconspicuous. In the middle 
of a lobe they are circular to oval in outline, perhaps half a dozen lying over 
each cell cavity; toward the base they become narrowly linear. Most of the 
leaf-cells, especially in the vicinity of the margin and apex, appear to be entirely 
free from verruculae of any sort. 
