Join ethnobotanist Martha Burgess for a morning of collecting, cooking and tasting the flower buds of the staghorn cholla from 9 a.m. to noon, Friday and Saturday, April 24 and 25; and Wednesday, April 29. $15. Age 12 and older only. Reservations are required. Call 615-7855, or e-mail firstname.lastname@example.org for more information.