Pima County environmental educator Meg Quinn discusses pollination strategies, general ecology and traditional uses of local cacti, at noon and 2 p.m., Wednesday, July 11; free. Reservations are required, but must be made no earlier than one week in advance; call between 9:30 a.m. and 5 p.m., Monday through Friday; or from 10 a.m. to 5 p.m., Saturday. Visit
wnpa.org for directions or more information.