504 Evans: HepaTICAE OF PuERTO RICO 
a short, simple and sterile innovation ; bracts obliquely spreading, 
scarcely complicate, unequally bifid, the lobe ovate, acute or 
acuminate, 0.35 mm. long, 0.12 mm. wide, margin irregularly 
denticulate, lobule varying from sharp-pointed to truncate, 0.17 
mm. long, 0.009 mm. wide, margin as in lobe; bracteole more 
or less connate on both sides at the base, narrowly ovate, 0.35 
mm. long, 0.1 mm. wide, bifid about one third with narrow, erect 
sharp-pointed lobes, and a narrow sinus, margin denticulate; 
perianth somewhat exserted, obconical, gradually narrowed 
toward base, 0.6 mm. long, 0.35 mm. wide, broad and truncate 
at the apex, and very shortly beaked, terete below, sharply 5- 
keeled above, the keels extending outward as triangular horns, 
acute to truncate at the apex, smooth or slightly roughened from 
projecting cells: or inflorescence occupying a short branch or 
terminal on a leading branch; bracts usually in 6 to 10 palls, 
imbricated, strongly inflated, shortly and subequally bifid, the 
lobe obtusely to acutely pointed, lobule blunter, keel strongly 
arched, cells in upper part forming a very narrow denticulate 
wing: bracteoles present at base of spike, small, bifid about one 
half, with erect-spreading pointed lobes and obtuse sinus: anthe- 
ridia in pairs: mature sporophyte not seen ( f/. 24, /. 8-7 6). 
On living leaves. Cayey, Evans (7ob). 
The specimens of L. stenophylla from Puerto Rico agree Very 
closely with those distributed in Hepaticae Cubenses Wrightianae- 
The latter were determined by Gottsche and the determination has 
since been confirmed by Schiffner. The species has also been 
reported from Mexico (the type-locality) and from Bolivia. 
L, stenophylla is very distinct from the two preceding species: 
It differs from them in its leaves, which are narrower and ben 
more sharply pointed ; in its leaf-cells, which lack local thicken- 
ings ; in the absence of a large basal ocellus ; and in the per 
of a subfloral innovation. Its underleaves also are very differ” 
in shape and are never angular below their spreading kit 
In its lobule, the apex of which is formed by a single tts 
curved cell, the species differs not only from ZL. elliptica and : 
exocellata but from nearly all the other members of the geo™ 
; une. 
and approaches in this respect several species of Drepanoleseu! 
LEPTOLEJEUNEA HAMULATA (Gottsche) Schiffn. : 
Leeunea hamulata Gottsche ; Wright, Hep. Cubenses > eet 
Engler’s Bot. Jahrb. 23: 587. 1897 (as synonym). 
Leptolejeunea hamulata Schiftn. 1. c. 
