Trailing Windmills (Allionia incarnata)
Description: The orchid-colored trailing four-o’clock is a vine that grows along the ground; the plant may be 10 feet across. The stems, leaves, and buds are covered with soft white hair. The stems and flowers are sticky, and one rarely finds a flower without grains of sand stuck on the upper surface. Technically, what appears to be 1 flower is a cluster of 3 resembling a single radially symmetrical flower but no one but a trained botanist would ever guess it.
The flowers remain open most of the day, not just in the evening as suggested by the name. The other species, Smooth Trailing Four-oclock (A. choisyi), from Arizona to Texas and southward, has a perianth 3/16 of an inch (5 mm) long or less, and the curved edges of the fruit each bear 5-8 slender, gland-tipped teeth.
Synonym(s): Trailing Four O'Clock, Pink Windmills, Trailing Allionia
USDA Symbol: ALIN
Size Class: 1-3 ft.
Bloom Color: Pink, Violet
Bloom Time: Apr, May, Jun, Jul, Aug, Sep, Oct
Water Use: Low
Light Requirements: Sun
Soil Moisture: Dry
Bloom Notes: Native Distribution: Southeastern California to southern Utah and Colorado; south to Texas, Mexico, and beyond.
Missing Images: Plant, Leaf, Fruit-Seed
Data Completeness: Complete