422 Lesquereux's Descriptions of 
nately divided, dichotomous, pinnz decurrent, divisions short, 
oval, acute; nerves obsolete ; surface and margins covered 
with long glandular hairs. 
48. PacHYPHYLLUM LACERATUM (spec. nov.). Like the 
former, but smooth, and with the divisions undulate and un- 
equally toothed. 
49. PACHYPHYLLUM LACTUCA, Lesqx. — Schizopteris lactuca 
Sternb. Frond pinnate ; pinnz lanceolate or broadly oval in 
outline, pinnatifid ; lobes lanceolate, pinnately divided ; divi- 
sions linear, obtuse ; nerves obliterate, parallel, and fasciculate 
below ; simple in each division. 
Genus ASPLENITES. Göpp. 
50. AsPLENITES RUBRA (nov. spec.). Frond bipinnate, 
(or tripinnate 2); pinnz broadly linear, half open, alternate ; 
pinnules oval, oblong, united at the base; medial nerve 
strong ; nervules forking once near the base ; fruit dots linear, 
placed in two rows between the margin and the medial nerve ; 
rachis thick, not inflated. 
Genus ALETHOPTERIS. Sternb. and Gópp. 
91. ÅLETHOPTERIS PENNSYLVANICA (spec. nov.). Inferior 
pinnæ bipinnatifid, with short, round pinnules, united half 
their length ; superior pinnz, pinnate only, with long lanceo- 
late, linear, and undulate pinnules, slightly decurrent on the 
rachis and united at the base; medial nerve broad, canalicu- 
late ; nervules perpendicular, slender, close, simple, or dicho- 
tomous. 
99. ALETHOPTERIS DISTANS (spec. nov.). Frond bipin- . 
 matifid; pinnz open, linear-lanceolate ; pinnules alternate, 
linear, narrow, very distant, pinnately crenulate, enlarged at 
the base ; united only in the upper part of the terminal pinne 
where they become broader, shorter, and obtuse; secondary - 
.. merves obsolete. : de 
m 53. ALETHOPTERIS OBSCURA (spec. nov.). Frond bipin- 
