Myriad Botanical Gardens, Botanical garden in Oklahoma City, United States

Myriad Botanical Gardens is a 15-acre botanical garden in downtown Oklahoma City. Its centerpiece is the Inasmuch Foundation Crystal Bridge Conservatory, a wedge-shaped building whose sloping roof of rectangular glass panes sits in a curved metal lattice above a concrete facade with a circular window divided by a vertical mullion. The structure widens into a rounded base partly hidden by trees, and three arched bollards line the path to the entrance.

The gardens trace to a 1964 downtown revitalization plan by architect I. M. Pei, adopted the following year. The name Myriad Gardens was chosen in 1970, and the city bought the land in 1975 for $900,000, clearing the Biltmore Hotel, City National Bank and Oklahoma Club. Construction began in 1977 with an artificial lake and conservatory foundations; the Crystal Bridge conservatory was built 1983–1985, and the gardens opened in 1988.

The gardens host the annual Oklahoma Gardening School, an all-day seminar usually held on the first Saturday in March, and Orchids in October, a three-day event with an orchid sale and a luncheon honouring the Crystal Award recipient. In late November the grounds join Downtown in December with lights set up for the event.

The grounds are free to roam; the Crystal Bridge Conservatory is the ticketed indoor part. The Oklahoma City Streetcar stops at Myriad Gardens station, and the site sits in the downtown district, so the outdoor paths and lake can be crossed on foot between surrounding streets.

The Crystal Bridge Conservatory opened in 1988, after construction began in 1983. Its sloping fanlike glass roof sits on a curved metal lattice above a concrete facade with a circular, vertically divided window. The Philodendron Dome nearby is an iron-and-bronze framework on an 8 by 9 foot base that visitors can step inside.