Palo Blanco, Willard's Acacia
Scientific Name: Mariosousa willardiana (Rose) Seigler & Ebinger
Synonym: Acacia willardiana
Family: Fabaceae
Sunset®: 12-24
USDA: 9b-12
Frost Tolerance: Hardy to 23°F (-5°C)
Heat Tolerance: Excellent
Sun Exposure: Full sun
Origin: Mexico (Sonora)
Growth Habits: Graceful small tree to 15 to 20 feet tall (4.5-6 m), 10 to 15 feet spread (3-4.5 m); peeling bark revealing the white inner bark; very small leaves at the end of elongated petioles
Watering Needs: Little water in Phoenix when established, no water in most other places
Propagation: Seeds
Blooming Habits:
Creamy rods, 1.25 to 2.5 inches long (3 to 6 cm) in mid to late spring.
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