Herbs perennial, with a thick woody rootstock. Stems terete, diffuse, twining, to 1.5 m, densely yellowish tomentose. Petiole 0-5 mm; leaf blade linear to linear-oblong, 2-3.2 cm X 3-5 mm, base sagittate, margin often undulate-crenate or subentire, apex acute. Bracteoles 2, above middle of pedicel, lanceolate. Pedicel 1.5-5.5 cm. Flowers 1 or 2 together, axillary. Sepals unequal, 5-6 mm, acuminate-cuspidate apically; outer 2 lanceolate-elliptic, sericeous; inner ones broadly ovate, margin ciliate, glabrescent. Corolla funnelform, ca. 1.2 cm, midpetaline bands appressed villous; limb 5-lobed. Stamens included; filaments ca. 4 mm, glabrous; anthers linear, ca. 2.5 mm, base sagittate. Disc ringlike. Ovary glabrous. Stigmas linear. Capsule globose, ca. 8 mm in diam., glabrous, apiculate. Seeds dark brown, ovoid, 3-4 mm, minutely tuberculate. Fl. Apr-May, fr. May.
Home