Ipomopsis longiflora  Angel Trumpet
ANNUAL or BIENNIAL.  Leaves dissected into a few linear segments.  Flowers about 3 cm long and 2 cm in diameter, tubular, with 5-6 flaring, slightly spiralling petals.  Flowers very pale purple but may look white from a distance.  Blooms in April-May.  Occasional in the Empires in desertscrub.  Scattered in unlikely looking places in coarse gravel, bajadas, etc.
FAMILY:  Polemoniaceae (Phlox Family)