Geotaenium epigynum (Hayata) F. Maekawa.

Herbs. Rhizomes horizontal, 4-5 mm in diam., internodes 1-2 cm. Leaves paired; petiole 4-6 cm, villous; leaf blade uniformly colored, narrowly ovate or ovate-lanceolate, 4-9 × 2.5-6.5 cm, abaxial surface densely pubescent, adaxial surface sparsely pubescent on veins and margin, base cordate, lateral lobes 1-2.5 × ca. 2 cm, apex acuminate; cataphylls oblong, ca. 0.8 × 0.4 cm. Peduncle declinate, 1-2 cm. Calyx slightly zygomorphic, greenish purple, subrotate, 1.5-2 × 2-2.5 cm; sepals connate beyond attachment to ovary, abaxially densely pubescent, adaxially dark red pubescent; tube obconic, 0.5-1 × 0.7-0.8 cm; lobes spreading, triangular-reniform or ovate-rounded, ca. 0.8 × 1 cm. Stamens 12; filaments shorter than anthers; anthers 0.8-1.2 mm; connectives extended beyond anthers, ligulate, less than 0.3 mm. Ovary inferior. Styles connate, short and thick, apex 6-cleft; stigmas terminal, radiating downward, decurrent. Fl. Feb-Mar.

* Forests, valleys. Hainan, Taiwan.