TAB. XXI. 
Aspidium (Lastrea) Vogelii. 
Humile pilosulum, fronde triangulari-ovata acuminata mem- 
branacea pinnata, pinnis oblongo-lanceolatis basi decurren- 
tibus lobato-pinnatifidis obtusis infimis subpinnatis, lobis 
pinnulisve ovatis obtusis, involucris reniformi-orbicularibus 
paucisetosis, stipite gracili brevi basi setuloso, caudice gracili 
repente. 
Hab. Fernando Po, Dr, Vogel, (Niger Expedition). 
Several specimens of this little species of Lastrea are in the 
Niger collection formed in Fernando Po, after the Expedition 
had left the Niger. One of the largest, and one among the 
smallest of the series are here represented. The frond is thin 
and membranaceous, semipellucid ; the largest scarcely ex- 
ceeding four inches in length, the upper extremity pinnatifid, 
ending in a long tapering point ; the lower portions pinnate, 
even bipinnate at the base. The rachis and primary veins, 
and even the surface, especially beneath, are pilose. The 
pinnas are more or less deeply lobed, decurrent with the rachis 
at the base. Sori generally one to each lobe or segment. In- 
volucre moderately large, orbiculari-reniform, denticulate at 
the margin, and bearing on its superior surface four or five 
spreading, jointed, hairs. The stipites are about half the 
length of the frond, slender, with a few bristly hairs at the 
base. Caudex slender, almost filiform, creeping. 
Fig . 1. Pinna with fructifications, seen from beneath, f, 2. 
Involucre magnified. 
