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Plants epiphytic or on rock. Stems long-creeping or short and erect, clothed in masses of dark brown hairs of 2 or more types, including multicellular gland-tipped hairs and elongate, sometimes branched and often multicellular, rhizoidlike hairs. Roots sparse or absent on creeping stems, numerous and wiry on erect stems. Leaves entire, lobed, or compound, 0.5--20 × 0.2--5 cm. Petiole short, wiry, often partially or wholly winged. Blade glabrous or with scattered, multicellular, gland-tipped hairs on veins; margins entire or minutely lobed, sometimes bearing dark stellate hairs (or orbicular scales, Trichomanes membranaceum ). Soral involucres conic. Sporangia sessile, formed at base of exserted bristle and carried outward by intercalary growth of bristle base. Gametophytes persistent, entirely filamentous or with proximal filamentous net producing aerial blades with gemmiferous apices. Gametophyte gemmae uniseriate.
Sori marginal, in tubular indusial pockets, the sporangia on a slender, bristle-like axis that may be exserted from the indusium. 275, warm reg.
Indusium tubular or trumpet-shaped, sometimes with two-lipped mouth; receptacle usually elongating considerably and protruding from old sori
Indusium cylindric to urceolate, often winged; mouth truncate, entire to slightly 2-lipped. Receptacle far exserted.
