Five-Angled Pipewort is a slender clustered annual
herb up to 20 cm tall. Leaves are up to 6 x 0.6 cm, curved, tapering,
hairless. Flower-cluster-stalks are numerous, 10-30 cm high,
threadlike, 5-6 ribbed, sheath up to 5 cm long, limb small. Head 6 x 5
mm, ovoid; involucral bracts 2 x 2 mm, obovate, toothed at tip,
straw-coloured; floral bracts 2.5 x 1.2 mm, wedge-shaped, abruptly
tapering, black, hairless. Female sepals are 3, equal, linear, sparsely
hairy, black; petals linear-oblong, hairy, hyaline, glandulose; seeds
oblong, appendages entire or cut up into rectangular strips on
transverse walls. Male sepals black, united into a split sheath,
minutely hairy, lobes flat; petal equal, hairy; anthers black.
Five-Angled Pipewort is found in Assam; Bangladesh; India; Myanmar;
Nepal; Pakistan; Sri Lanka; Thailand; Vietnam. It is found throughout
Eastern Ghats and in lower Himalaya.