ANTIQUES ROADSHOW host Mark L. Walberg visits Phoenix' Desert Botanical Garden with appraiser Don Creswell for a discussion of antique botanical artwork. Program highlights include a 1982 bronze maquette by renowned sculptor Henry Moore; an heirloom amethyst jewelry collection; and an early abstract painting by noted modern artist Chuck Close, received by the guest's father as repayment of an $8 loan, valued at $100,000 to $150,000.