Datura ceratocaula is a species of Datura. It is weed-like in its natural habitat, but is grown in gardens and yards as an ornamental plant. The flower has a sweet smell. It is an annual plant that originally came from Mexico.

In its natural habitat Datura ceratocaula grows in shallow water or in a swamp. It has a hollow gray-green stalk between 12 and 36 in. long, with toothed, undulated ovate-lanceolate leaves that have hairs on the underside.

The plant's broad, funnel-shaped flowers bloom from June to September. They are white with a blue cast on the outside and white to pink on the inside. The seed pods are not thorny like those of most Datura species, instead having the appearance of inverted eggs as they dangle from the plant. The plant's stalks are curved like an animal's horn (ceratocaulus = horn stem), and have less tendency to fork than other species of Datura.

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