TAB. CCXXXI. 
DAVALLIA ANGUSTATA. 
FILICES.—GvnzATE. Br.  PorvroniACEX. Kaulf. Bue vere. JWilld. 
GzN. Cuan. DAT AALLLA, Sm. Sori subrotundi (vel in lineola verticali) margini plerumque 
approximati. Zmvolucrum superficiarium, ex apice vene unice ortum, lateribus vel lata basi 
adnatum, exterius et verticaliter liberum. Zr. 
DavarLrA angustata; frondibus subuniformibus simplicibus lanceolatis acuminatis coriaceis cre- 
nato-dentatis, soris marginalibus, stipite compresso glabro, caudice repente squamoso. 
Davallia angustata. — all. in Herb. 1823. — Cat. of. Pl. in Mus. of E. I. C. No. 242. 
. Has. In Insula * Singapore" dicta. JV. JF'allich, M.D. : 
Cauder repens, ramosus, crassitie pennse corvinz, densissime paleaceo-squamosus; squamis lanceolato-subulatis, 
erectis, fusco-ferrugineis. 
Stipites pollicares, erecti, compressi, marginati, glabri, nudi. 
Frons digitalis, lanceolata, coriacea, subnitida, dentato-crenata, costata, parallelim venosa; venis latiusculis fur- 
catis: fertilibus paulo angustioribus, lineari-lanceolatis, marginibus magis dentatis, in sinubus dentium sori- 
feris; soris solitariis. 
Awoolucrum transversim ovale, lata basi affixum, membranaceum, planum. 
Capsule obovato-globoss stipite subduplo breviores. 
Semina pallida, pellucida, subelliptica. 
Fig. 1. Portio frondis fertilis, subtus visa. f£ 2. Capsule. f. 3. Semina:—magn. auct. 
The present very interesting species of Davallia is one of the few possessing a simple frond, and 
is certainly most nearly allied to the JD. AeteropAylla (Ts. 230.): but the caudex is shorter and 
thicker, clothed with much longer and differently shaped scales. "The fertile and the sterile fronds 
differ very little in shape from each other; the margins are simply crenato-dentate, and in the sinus 
of each tooth is a sorus; so that these sori are arranged in a single line on each side at the margin 
of the frond. The texture is more rigid and coriaceous, the surface more glossy :—the nerves, 
diverging from the midrib, not so crowded, and very broad in proportion to their length. 
