One to several tubers are arisen. Stem is up to 15 m long and 1 cm in diameter and green to purplish in color and reddish brown when dried. Leaves are opposite or rarely sub-opposite. Leaf blade is ovate, or deltate-ovate. Flowers are 1.5 x 1.5 mm. Capsules are up to 8 per spike, 2.3 x 3.7, basally tinged with red.