MAXON—STUDIES OF TROPICAL AMERICAN FERNS. 397 
single series; indusia orbicular-reniform, small, minutely puberulous, sparingly 
short-ciliate. Leaf tissue membrano-papyraceous, yellowish green, persistently and 
conspicuously glandular-pubescent below, sparsely so above, the margins slightly 
undulate, persistently ciliate. 
Type in the U. 8. National Herbarium, no. 715543, collected upon the Cerro Vaca, 
eastern Chiriqui, Panama, altitude 900 to 1,136 meters, in forest, December 25 to 28, 
1911, by H. Pittier (no. 5322). 
Several specimens collected at the same locality show no variation except in size. 
This species is perhaps closest allied to O. costaricensis, from which it differs particularly 
in its larger and persistently short-pubescent fronds and in the slender, mostly non- 
crinite scales of the costa, as well as in its sparingly ciliate indusia and fewer veins. 
9. Oleandra trujillensis Karst. Fl. Columb. 1: 147. 1860. 
Type LocaLity: Near Escuque, Venezuela, altitude 1,000 meters, upon rocks and 
tree trunks. 
DistripuTiIon: Apparently known only from the original locality. 
ILLUSTRATIONS: Op. cit. 1: pl. 73. /. 1-5. 
No specimens of this species have been seen by the writer; but Karsten’s very full 
description and elaborate illustrations leave no doubt as to its identity and distinct- 
ness. It is said to be an inhabitant of the warm zone of the mountains about Mérida, 
and will doubtless be found in Colombia and eastern Panama. 
10. Oleandra trinitensis Maxon, sp. nov. 
Rhizome scandent, rather freely branched, 4 to 5 mm. thick, densely appressed- 
paleaceous, the scales lance-subulate, 4 to 6 mm. long, fimbriate, at first sparingly 
fibrillose toward the tip, bright castaneous; phyllopodia numerous, distant to approx- 
imate, stout, knob-like, oblique, at first concealed by the dense covering of scales; 
stipes 1 to 2 cm. long, olivaceous to brown; lamina 15 to 28 cm. long, 2.5 to 4 cm, 
broad, linear-oblong, ligulate, straight or rarely subfalcate, acuminate to long- 
acuminate, broadly and often abruptly cuneate at the inequilateral base; costa 
strongly elevated beneath, brownish or olivaceous, nearly glabrous, persistently 
paleaceous at the sides, the scales spreading, reddish-brown, lanceolate and slightly 
glandular-fimbriate, or the lower ones deltoid-lanceolate and strongly glandular- 
fimbriate; veins arising in 2’s or 3’s, sometimes branched, 19 to 23 per centimeter 
near the margin; sori small, situated 2 to 6 mm. from the costa (never against it), 
more than half of them arranged in an irregular single series; indusia small, orbicular- 
reniform, not ciliate, minutely glandular-pubescent. Leaf tissue membrano-charta- 
ceous, highly lustrous, yellowish green, somewhat iridescent, minutely puberulent, 
glabrescent, delicately marginate, obscurely and very scantily ciliate, the hairs 
caducous. 
Type in the U. 8. National"Herbarium, no. 50836, collected in Trinidad, 1877-78, by 
A. Fendler (no. 114). 
ADDITIONAL SPECIMENS EXAMINED: 
Trinipap: Heights of Aripo, Coll, Bot. Gard. Trinidad 333 (two sheets). Also a 
second sheet of the type collection. 
An ally of O. costaricensis, from which it differs obviously in the strap-like shape 
of its fronds and the character of the costal scales. 
11. Oleandra costaricensis Maxon, sp. nov. 
Rhizome scandent, 2.5 to 5 mm. thick, densely appressed-paleaceous, the scales 
lance-subulate, castaneous and conspicuously crinite-fibrillose; phyllopodia distant 
to subfasciculate, 1 to 5 mm. long, densely paleaceous at first, thus appearing stout; 
stipes 0.5 to 2 cm. long, slender, light brown, deciduously paleaceous; lamina 15 to 
25 cm. long, 1.5 to 4 cm. broad, very variable in shape, linear-oblanceolate to linear- 
oblong, acuminate, long-caudate, gradually narrowed in the lower part and narrowly 
