Nephrolepis biserrata

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Nephrolepis biserrata


Habit, rhizome morphology. Hairs on lamina absent or sometimes present, costa sometimes present.


Asia-Tropical, Pantropical present
Pantropical; in Malesia: Throughout.


1. Nephrolepis biserrata is very variable in frond size, shape of pinna-base, width of pinnae, hairiness, and to a lesser degree position of the sori. In Malesia, pubescent forms occur mainly on Borneo, where they seem to be increasing as a result of recent forest fires — the burnt areas are quickly covered with a dense mat of sterile specimens of this form — and on New Guinea.
2. Here we follow the traditional, wide circumscription of N. biserrata, which includes all Nephrolepis-forms with clearly inframarginal to medial sori with narrow sinus. Other rather constant characters are the basal stipe scales, which are uniformly narrow, concolorous and spread out sideways in one direction and the generally fairly large size of the plants. However, it is possible that in this circumscription a number of cryptic species are included. Herbarium studies may not be able to resolve these species partly for the usual reasons: lack of complete, well-documented specimens.


J.Sm. 1875: Hist. Fil.: 227
Blume 1828: Enum. Pl. Javae: 147
C.Presl 1830: Reliq. Haenk.: 31
Holttum 1968 – In: Revis. Fl. Malaya, 2nd ed: 380
Sw. 1806: Syn. Fil.: 46
Brack. 1854 – In: U.S. Expl. Exped.: 213
Baker 1867: Syn. Fil.: 301
Blume 1828: Enum. Pl. Javae: add. et emend.
Sw. 1806: Syn. Fil.: 46
Sw. 1806: Syn. Fil.: 46
Copel. 1958 – In: Fern Fl. Philipp.: 187
Hovenkamp & Miyam. 2005 – In: Blumea: 290
Merr. 1918: Sp. Blancoan.: 43
Backer & Posth. 1939: Varenfl. Jav.: 92
Brack. 1854 – In: U.S. Expl. Exped.: 212