TAB. LX. 
Asplenium (Darea) Mann it, Hook , 
Nanum, caudice fiiiformi sarmenteso longe repente intricate? 
copiose radiculoso, stipitibus subaggregatis vix biuncialibus 
gracilibus, frondibus biuncialibus oblongo-ovatis subcarnoso- 
coriaceis viridibus bipinnatis, pinnis remotis, pinnulis subu- 
nilateralibus, sterilibus linearibus obtusis, fertilibus apice 
oblique semiovatis rostratis monosoris, involucro (ratione 
plantie) amplo laxe membranaceo. 
Hab. Peak of Fernando Po, elev. 3000 feet above the level 
of the sea, epiphytal, Gustav Mann . 
Evidently one of the Darea - group of Asplenium, but ex- 
tremely unlike any described species, though allied to A, 
brachypterum of Kunze : yet it can hardly be a state of that ; 
the caudex and pinnules and habit are so different. The for- 
mer resembles a slender filiform stolon, forming dense copious 
intricated masses, at distances throwing out tufted fibrous 
roots, on the undersides, and a few clustered fronds on the 
upper. The fertile segments with their oblique semiovate 
apex almost exactly resemble in shape the Buxlaumia apliylla 
among mosses, and the delicate membranaceous involucre is 
large and lax. The term pinnatifid is more applicable to 
these fronds than pinnate : a single vein passes through the 
centre and terminates in a clavate apex below the extremity 
of each segment ; from the upper side this sorus arises. 
Tar. LX. Portion of a tuft of Asplenium Mannii, nat. size. 
Fig. 1. Anterior side of a fertile pinna or segment, and f. 2. 
Posterior, or underside of ditto ; — magnified. 
Cent, 2. i. 60. 
