Spiral-Vined Silkpod is a woody lianas, up to 10 m long, hairless except
for inflorescences. Branches are pale gray. Leaf-stalk is 2-4 cm. Leaves
are ovate or subelliptic, 4-12 X 3-7.5 cm, base wedge-shaped to shallowly
heart-shaped, lateral veins 5-7 pairs. Flowers are borne in cymes 8-15 X
8-11 cm, which are carried on stalks 3-9 cm long. Sepals are 2 mm, glands
broadly triangular, membranous. Flowers white or greenish, tube about 5
mm, limb 1-2 cm wide, petals about 6 mm. Anthers are about 3.5 0.6 mm,
inserted at middle of corolla tube. Ovary as long as or slightly shorter
than disc, glabrous. Seed-pods are 2, linear-cylindric, parallel, 7-16 X
1-2 cm. Seeds are oblong 1.5-1.8 cm X 2 mm. Flowering: April-October.