Datura ceratocaula is the only species that naturally grows in shallow water or swamp conditions. It grows 12-36 inches tall and the leaves are toothed with short white hairs on the undersides. All summer it bears wide, funnel-shaped flowers that are white to pale pink and have a bluish tint on the outer sides. The seedpods are smooth (no spines), hang downward, and will fall apart when the seeds are ripe. Growth is rather sparse compared to other species but the large fragrant flowers make them worthy of cultivation. The 7-inch blooms open up in mid-day and close the following morning. A large group planting will provide the nicest display. D.ceratocaula will do best in a sunny and warm location. A damp soil or shallow water is best but they will tolerate ordinary garden soil with sufficient watering.
(2) http://jlhudsonseeds.com/SeedlistD.htm
--ceratocaula. (e,l) DATU-4. $2.00
Very difficult to germinate; needs GA-3.
--ceratocaula GA-3. (e,h)DATU-4G. $3.00
'TORNA LOCO'. Large white 4 - 7" fragrant trumpets with 5 rosy stripes in the throat and a pale lavender edge. Peculiar fleshy annual to 3 feet, with narrow leaves, silvery on the underside, thick forking often purple stems, and smooth egg-shaped 2" pods. México. Often semi-aquatic, growing in shallow water. Germinates in 1 - 3 weeks with GA-3.