The Damson Squash is a knotted, vine-like shrub producing purple squash.
From a single, knotty stem, notable for its leathery purple skin, the plant branches into multiple vines, each terminating in a gourd-like fruit.

A Damson Squash plant in a field
Na'vi Culture[]
Although inedible, the Na'vi have been known to collect these for their decorative and pleasing appearance.