Posted on August 5, 2022August 6, 2022 by WillemFriday/ a white poppy Here’s a Matilija poppy (Romneya coulteri) that I had found on Kitsap Peninsula yesterday. The Matilija poppy is native to southern California and Baja California. It has large, showy flowers, each with six crinkly white petals. At the center of the flower is a cluster of many yellow stamens.