Peraphyllum is a monotypic genus of flowering plants in the rose family containing the single species Peraphyllum ramosissimum, commonly known as wild crab apple. It is a shrub which may reach 3 meters in height and bears small pomes about a centimeter wide. Peraphyllum is most closely related to Amelanchier, Malacomeles, Crataegus, and Mespilus Squaw apple grows in California, Oregon, Idaho, Utah, Colorado, and New Mexico usually in pine and juniper woodlands. In California it can be found in the High Cascades, High Sierra Nevada, and Great Basin. Translated from the Greek, the genus Peraphyllum means "very leafy" and the species name ramosissimum means "many branches".