Filoli Center, a National Trust property in Woodside California hosts a big flower and garden show each year in honor of Mothers Day.
For many years now, Sei Boku Bonsai Kai of San Mateo, CA sets up a bonsai exhibit as part of the festivities.
Several images of members bonsai to follow.
Check the link for a look at Filoli.
Mike
http://www.filoli.org/
First three bonsai are a styrax japonica, a yew, and a trident maple grove.
Next three are a redwood, a Sierra juniper, and a satsuki.