Plants on rock or epiphytic. Stems long-creeping, threadlike, and intertwining, bearing scattered leaves, covered with dark hairs of 2 types, 2-celled glandular hairs and elongate rhizoidlike hairs; roots absent. Leaves elliptic to oblanceolate, simple, 0.5--2 cm × 2--5 mm, ± entire, bearing simple or 2-cleft dark hairs on margin and 2-celled glandular hairs on petioles and veins; petioles nearly as long as blades. Venation weakly pinnate with numerous unconnected false veins. Soral involucres usually 1 per leaf, terminal on blades, short-conic, flaring widely at mouth; involucre lips not dark edged. Gametophytes composed entirely of branched filaments. Gemmae composed of short filaments of undifferentiated cells. 2 n = ca. 102.
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