Mammillaria macdougallii  Flat Cactus
CACTUS.  Disc-shaped, with dark green tubercles.  Usually nearly flat at ground level.  After long rainy periods, may swell to a shallow dome shape.  Flowers light pink to white, with pink stripes, blooming in April.  Fruits bright red.  Rocky ridgetops and gentle slopes in desert grassland.  Occasional nearly throughout the Empires except at the lowest elevations.  Formerly M. heyderi var. macdougallii.  Plants from the Empires and Las Cienegas NCA have pink flowers, while those from Mt. Fagan and the Santa Rita Mts. bajada, east of Davidson Canyon, typically have yellower flowers.
FAMILY:  Cactus Family  (Cactaceae)