Dioecious plant, yellow to red. Length from fusion with host root to top of upper leaves about 9 cm. Tubers always single in the material studied, spherical, 1½-2½ cm ø, surface granular with scattered to numerous stellate warts. Leaves 12-16, deep pink, opposite, decussate, gradually increasing in size upwards, the basal ones being small and bract-like, while the upper 2-3 pairs are ovate to almost orbicular, 2½-4¼ by 2½-4 cm. In wet material 8-14 longitudinal nerves are easily observed; the nerves are forking in the middle part of the lamina. The upper 2-3 pairs of leaves conceal the flowering inflorescence completely. ♂ Inflorescence subspherical-ellipsoid, 2½-2¾ by 2½ cm. Bracts 2 mm long and 5 mm wide, truncate or almost rudimentary. Pedicels 6-7 mm long. ♂ Flowers bisymmetric or zygomorphic through lateral elongation, 4(-5)-merous. Median tepals 5 mm by 4 mm, truncate. Lateral tepals 5 by 2½-3 mm, acute. Synandrium with fertile part slightly laterally elongated, 3 mm long, anterior-posterior width 3½ mm, lateral width 5 mm. Anther cells parallel, running from base to top of synandrium, longitudinally opening. ♀ Inflorescence ellipsoid, 3¼ by 2¼ cm. Spadicles 1100-1500 μ long, with a cylindrical lower part c. 180-230 μ wide and an obovoid to truncate upper part, 320-380 μ wide. Largest flowers with pistils 1450-1750 μ long, ovaries 240-320 μ long, ellipsoid.
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