is similar to eschscholzia minutiflora
in that the leaves grow both at the base and along the stems, and are finely divided, but this is a generally larger-flowered plant, and has leaflets that are narrow (linear), pointed, quite well separated and equally sized; the comparable species has wider, rounded-tipped leaflets, closer together, and becoming larger towards the leaf tip.
Buds are nodding while the flowers point upwards when fully open. Petals are around one inch long, overlapping for most of their length, forming a wide cup shape. The green (later brown) fruits are 2 to 3 inches long, noticeably thicker towards the base. Leaves are generally bright green or yellowish green, not the dull grey green of some similar species.
The range of Parish's poppy is limited to the deserts and mountains surrounding the Salton Sea, including Anza Borrego Desert State Park and Joshua Tree National Park.