Generic name referring to the similarity with Niphibolus and Pleuridium crassifolium and combining these names.

Fronds simple and elongate with simple venation. Spore cases in single rows between the main veins. Spores smooth and monolete( with a single line on the spore indicating the axis on which the mother spore was split into four along a vertical axis).

This genus was formerly placed in Polypodium.

Mostly epiphytic. c. 10 species from C and S America and Caribbean.

Division, spores.

Sori in single rows between the main lateral veins.

Lellinger (1972).

Source: Spencer, R. (1995). Polypodiaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 1, Ferns, conifers & their allies. The identification of garden and cultivated plants. University of New South Wales Press.