456 BENEDICT: ANTROPHYUM 
nected, divergent from near the costa toward the margin; fronds 
elongate-oblong, 26 x 4.cm., 35 x 4.cm., 39 X 3.4 cm., narrowed 
very gradually below to a subsessile base, less gradually above to 
an acute apex (young fronds rounded or obtuse), membranous, 
firm; epidermis smooth and dull; margins flat, thin, slightly 
repand; areolation rather distinct; areolae divergent from the 
costa ; marginal areolae open, ends of free veinlets enlarged and 
usually darkened; costa disappearing toward the apex, and visi- 
ble only by transmitted light. 
Colombia and Venezuela to Bolivia; Jamaica(?). Alt. 1800- 
2300 meters. . 
Borivia : Santa Barbara, Williams 1355. VENEZUELA: Manoa, 
Lower Orinoco, Rusby & Squires 371 ; without definite locality, 
Fendler 305, in part (Eaton Herbarium). 
Kunze’s description is as follows : A. fronde lineari-lanceolata, 
ensiformi-curvata, acuminata, bas longe attenuata in stipitem decur- 
vente, tenuiter marginata, costata; venis obscuris, areolis erectis ; 
Soris tmmersis, flexuosis, interruptis, nec basin, nec apicem, nec 
marginem attingentibus. 
It will be seen that the two descriptions differ in two characters, 
outline and soriation. Kunze has “ Jdineari-lanceolata”” as com- 
pared with my “elongate-oblong,” and “ soris immersis”’ instead 
of “superficial.” The difficulty regarding the first point is re- 
moved by a further reference to the form in his discussion of the 
species. He speaks of it as less spatulate than A. brasilianum. 
This would make it correspond to the description given here. In 
the other case, it is probable that the facts were misinterpreted. 
Soral lines which are not at all immersed, may appear so because of 
a blackening of the line of attachment. But, whatever the name 
eventually adopted for this species, it is distinct from A. drasili- 
anum, with which it has always been confused. 
The best distinctive character is found in the marginal vena- 
tion, which in this species consists of free veinlets, the ends of 
which are thickened and usually blackened or brown. In good 
material these ends appear as a line of dots around the leaf about 
one and a half millimeters inside the thin margin. The dull 
smooth surface and the very thin tissue also serve to differentiate 
it from A. dbrasilianum, which has a wrinkled and rather glossy 
surface, and a thicker leaf. 
