Description from Flora of China
Plants terrestrial or epiphytic. Rhizome erect, short, dictyostelic, producing long wiry stolons and sometimes tubers giving rise to new plants. Stipe tufted; lamina pinnate; pinnae sessile, articulate to rachis, lanceolate or falcate, base usually asymmetrical, often auriculate on upper side, margin crenate. Sori orbicular, terminal on a veinlet; indusia orbicular-reniform, often with a narrow sinus or lunulate, with broad sinus. x = 41.
About 20 species: most tropical regions of the world; five species (one introduced) in China.