Datura ceratocaula
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". Toxicity. All parts of "Datura" plants contain dangerous levels of poison and may be fatal if ingested by humans or other animals, including livestock and pets. In some places it is prohibited to buy, sell or cultivate  Datura plants. "Datura ceratocaula"'s toxicity is such that it can be transmitted up the food chain. A species of duck lives in the swamps and lagoons near Mazatlán. Their meat is said to be poisonous, and eating it has been known to produce symptoms of having been poisoned or drugged. This was long a mystery, but now it is known to be due to "Datura" poisoning. The ducks eat the leaves and seeds of "Datura ceratocaula", and their flesh contains a toxic level of poison from this diet.