Leo wrote > We have several bulbs in the lower Sonoran Desert, including what we know as > Dichelostemma pulchellum, as well as Hesperocallis undulata. There are also Asclepias > and Datura species with undergound storage organs. Datura are mostly annuals and some of them can become very weedy. Never seen a datura with underground storage organ. Do you have a name and picture of such a datura. Aad