286 SLtossoN: NEW FERNS FROM TROPICAL AMERICA 
arcuate, at least when dried, somewhat asymmetrical, acuminate, 
the apices serrate to subentire, giving rise gradually to the pin- 
nules; basal pinnae either the broadest, 7 to 25 cm. broad, or equal 
to the next above, broadly ovate or ovate-lanceolate, median pin- 
nae ovate-lanceolate or lanceolate, upper pinnae lanceolate; 
pinnules adnate-decurrent, the inner in the inner pinnae mostly 
lanceolate, obtuse or acute segments, the larger of which are 
coarsely and obliquely lobed or toothed; smaller pinnules con- 
tiguous and similar to the larger segments; both basal pinnules 
reduced and sometimes the next pair somewhat so, the basiscopic 
basal pinnule the shortest, 1.7 cm. or less long, in the upper of 
median pinnae often merely a toothed auricle and then adnate 
to the primary rachis; upper surface bright olive green, glabrous, 
lower surface paler, glaucous, and sparingly furnished with ml- 
nute flexuose flattened articulated hairs, especially on the veins, 
costae, and rachises; texture chartaceous; venation prominent, pit 
nate, veins catadromous; sori terminal on lateral teeth of the 
lobes or segments, erect or deflexed, each apical on a simple veil, 
or the upper branch of a once forked vein or a spur produced from 
the upper side of the latter branch; ‘ndusia sessile, calyciform, 
rarely urceolate, entire; receptacle somewhat’ exserted; sporang? 
intermixed with simple articulated paraphyses; spores fuscous, 
tetrahedral, convex on the upper side, verrucose. 
Type in the Underwood Fern Herbarium at the Le 
Botanical Garden, collected in wooded ravines, near Apolo, Bolivia, 
South America, July 25, 1902, R. S. Wilhams 1303. 
From L. costaricensis Christ* and L. Lehmantt Hieronymus! 
as described, L. notabilis differs chiefly in the following char- 
acteristics, From L. costaricensis, in the bright olive green upper 
surface and glaucous under surface of the lamina, in the es 
spicuous reduction of the principal pinnae at the base on bo 
sides, and in the verrucose spores. L. costaricensis is descti 
as having the upper surface of the lamina dark green, the _ 
surface not glaucous, the basal acroscopic pinnules the en 9 
pinnules of the principal pinnae, and the spores smooth, From a 
Lehmanii, L. notabilis differs in the much greater size of the! 
in the color, blackish or purplish castaneous t 
the rhizome, stipes, and their scales, in the shape of it “— 
New York 
* Bull. Boiss. II. 4: 399. pl. 2. 1904. 
+ Bot. Jahrb. 34: 435. 1904. 
