Poster consists of green, purple, yellow and white print on off-white paper. Text at the top is green and curbed to simulate the flowers in the image below it. Text reads "California Wildflower Show / Saurday May 5, 1990 10m-5pm Sunday may 6 Noon to 6pm / Natural Sciences Gallery, The Oakland Museum, 1000 Oak Street, Oakland, California / Funding by California Native Plant Society, Eaton Botany Fund, and the Natural Sciences Guild." Image depicts a group of puprle, violet, yellow and white wildflowers.