A conspectus of the native and naturalized species of Nephrolepis (Nephrolepidaceae) in the world
Hovenkamp PH
Miyamoto F
Blumea
2005
50
279
322
4722L
H. Christ
H. Christ
Polypodiopsida
Nephrolepidaceae
Nephrolepis
Plantae
Polypodiales
21
300
Tracheophyta
species
dicksonioides
Habit, rhizome morphology. Plants forming tufts of 2 or 3 fronds. Runners 1.5-2 mmthick, branching angle divaricate. Scales on runners dense, spreading. Tubers absent. Fronds 200 cmlong (or more), 16-18 cmwide, stipe 33-35 cmlong. Lamina base strongly reduced, tapering over 30 cm,basal pinnae 1.2-2.5 cmlong, 4-6 cmdistant, middle pinnae slightly to distinctly falcate. Sterile pinnae 9.5-11 by 1.6-2 cm,leathery, base strongly unequal, basiscopic base rounded or cordate, acroscopic base cuneate or truncate, not auricled, margin in basal part entire, towards apex crenate or serrate, apex acuminate or to 1.5-2.5 cmcaudate. Fertile pinnae 10-15 by 0.6-1.2 cm,different from sterile pinnae in the margin deeply incised between the sori, especially towards pinna-apex, and the apex more gradually narrowed to a 2.5-4 cmlong cauda. Indument. Basal scales pseudopeltate, spreading, 5 by 2-2.5 mm,central part rufous, shining, marginal glands absent, margin not hyaline, in basal part ciliate or fmbriate, in acumen ciliate or fmbriate. Rachis scales dense, with a well-developed protracted acumen, appressed (inconspicuous), hyaline or light brown, acumen ciliate. Scales on lamina absent. Hairs on lamina and costa absent. Sorimarginal (or nearly marginal), often on dilated teeth, especially towards the pinna-apex, 20-32 pairs on fully fertile pinnae, elongated (sometimes confluent near the base of the pinna), not impressed. Indusium broad, attached at broad base.
Distribution - Eastern part of Malesia: Celebes, Moluccas, New Guinea, Solomon Islands.
Habitat & Ecology - Terrestrial, on rocks, or epiphytic. Disturbed places in lower montane forest, in ridge forest or disturbed secondary forest, 400 -1900 m.
Note - Nephrolepis dicksonioideshas been confused with N. abruptaand N. acuminata. It has fertile pinnae similarly incised as typical specimens of N. acuminata, and marginal sori similar to those of N. abrupta, but differs from both in the indusium having a broad base, innervated by 2 or 3 veins. The apex of the sorus-bearing tooth is often dilated. From N. abruptait can also be distinguished by the shape of the pinnae: the fertile ones are more constantly deeply divided, the sterile ones more distinctly acuminate, narrowing to a distinct cauda from c. halfway.
923901028
2005-01-01
2005-12-31
2005-01-01
P
Sarasin 1030
Guinea
Celebes
21
300
Celebes
923901030
923901037
923901031
2005-01-01
2005-12-31
2005-01-01
K, L, P
Schlechter 16494
Guinea
New Guinea.
21
300
New Guinea.
Type