Terrestrial, rupestral or epiphytic ferns. Rhizomes erect or short-creeping, scaly, often producing long-creeping runners that form adventitious buds and sometimes bear tubers. Fronds monomorphic, not articulated to the rhizome. Laminae 1-pinnate, herbaceous, scaly and sometimes hairy. Veins free, ending in hydathodes near the lamina margin. Sori round (NZ) to elongate (not NZ), borne on abaxial surface, marginal to medial; paraphyses absent; indusia attached on one side, reniform to lunulate (NZ) or rarely linear (not NZ); sporangial maturation mixed. Sporangia with vertical annulus, usually 64 spores per sporangium. Homosporous; spores monolete, lacking chlorophyll; perispores tuberculate, verrucate or rugose.
A family of one genus and c. 19 species (Hovenkamp & Miyamoto 2005; PPG 1 2016).
Nephrolepis and 11 other genera were originally included within Davalliaceae by Copeland (1947), a classification which was followed in New Zealand by Allan (1961), Brownsey et al. (1985) and Brownsey & Smith-Dodsworth (1989). Pichi Sermolli (1975) created the new family Nephrolepidaceae for just three of these genera, Nephrolepis, Arthropteris and Psammiosorus, but the latter two genera are now included in Tectariaceae, leaving Nephrolepidaceae as a monotypic family (Hennequin et al. 2010, PPG 1 2016). Nephrolepis was included in Lomariopsidaceae by Smith et al. (2006) but is now generally treated in Nephrolepidaceae, a family that has been adopted in New Zealand since Brownsey & Smith-Dodsworth (2000).
The family Nephrolepidaceae comprises terrestrial or epiphytic species with erect or short-creeping rhizomes that often produce runners bearing adventitious buds and sometimes tubers. Fronds are monomorphic, 1-pinnate, scaly and sometimes hairy, and bear round to elongate sori that are marginal to medial and protected by reniform, lunulate or linear indusia.
A small family that is pantropical in distribution, but most species are confined either to the Neotropics or to the Paleotropics, with a few extending into the southern temperate zone. The greatest diversity is in the Malesian region (Hovenkamp & Miyamoto 2012).
Category | Number |
---|---|
Indigenous (Non-endemic) | 2 |
Exotic: Fully Naturalised | 1 |
Exotic: Casual | 1 |
Total | 4 |
The name Nephrolepidaceae Pic.Serm. was published in Vol. 29, No. 1 of Webbia. The part is dated 1974 but reprints have been hand-stamped "Pubblicato in data 10. Feb. 1975".