TAB. XCIII. 
Davallia (Dareoide^) NIGRESCENS, Hook. 
Stipite pedali et ultra subrobusto viridi-fusco squamis subu- 
latis parvis paleaceo, fronde sesquipedali ad bipedalem late 
ovata acuminata submembranacea flaccida glaberrima sicci- 
tate nigrescente 3-4-pinnata, pinnis primariis secundariis- 
que ovato-lanceolatis longe acuminatis petiolatis ultimis 
pinnatifidis, laciniis oblongis ovatisve subsecundis acutis 
integerrimis uninerviis, nervis infra apicem terminantibus, 
soris ad marginem superiorem pinnularum seu laciniarum 
insertis prominentibus, involucre calyciformi (hemispherico) 
firmo frondis colore margine integerrimo, rachibus ubique 
planiusculis Iseviter marginato-alatis. 
Hab. Peak of Fernando Po ; elev. 3000 feet. Gustav. Mann, 
n, 448. 
It is difficult to say whether this should be referred to 
Davallia or to Dicksonia. If considered a Davallia, the por- 
tion of the frond to which the involucre is attached, is so 
tumid as to represent, on the upper side of the frond, the invo- 
lucre on the underside, thus exhibiting a perfectly hemisphe- 
rical cup with an entire margin, but sunk in the frond. In 
habit and ramification it very much resembles Asplenium 
(Darea) Shuttleworthii of Kunze in Schk. Fil. SuppL p. 26, 
t. 14; but there the sorus and involucre are truly dareoid, 
laterally elongated ; here hemispherical. 
Tab. XCIII. Fig. 1. Portion of stipes of Davallia nigres- 
cenSy Hook.; and f, 2 and 3, apex and primary pinna of a 
frond ; natural size. f. 4. Ultimate fertile pinna with sorus ; 
magnified, f. 5. Sorus from which the involucre is removed, 
showing the long stipitate capsules; more magnified. 
Cent. 2. t. 9S. 
