Plants epiphytic or on rock. Stems long-creeping, threadlike, bearing scattered leaves; stems covered with dark hairs of 2 types: 2-celled glandular hairs and elongate rhizoidlike hairs; roots absent. Leaves oblong, 1--2-pinnatifid, 1--5 × 0.5--1.5 cm, with dark, stellate marginal hairs between lobes, 2-celled glandular hairs on petioles and veins, and dark rhizoidlike hairs on petioles and sometimes abaxially on blades; petioles shorter than blades. Venation pinnate with unconnected false veins. Soral involucres terminal on lobes near leaf apices, conic, flaring at mouth; involucre lips narrowly dark edged. Gametophytes composed entirely of branching filaments. Gemmae composed of short filaments of undifferentiated cells. 2 n = 136.
Home