Amorpha fruticosa seeds mature in Nov.Common Name: false indigo
Type: Deciduous shrub
Native Range: Southern United States
Zone: 4 to 9
Height: 4.00 to 12.00 feet
Spread: 6.00 to 15.00 feet
Bloom Time: April to June
Bloom Description: Purple with orange-yellow anthers
Sun: Full sun
Water: Medium to wet
Flower: Showy, Fragrant
Tolerate: Wet Soil
Amorpha fruticosa seeds
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- False indigo is a deciduous shrub that typically grows to 4-12' (less frequently to 20') tall with a spread often in excess of its height. It is native to moist open woodland areas, floodplains, stream banks and swamp margins from central to eastern Canada south throughout much of the U. S. into northern Mexico. It features compound, odd-pinnate leaves (each to 12" long). Each leaf contains 11 to 35 spiny-tipped, oval to elliptic, dull gray-green leaflets (to 2" long) with glandular dots and toothless margins. Tubular scented flowers (each to 3/8" long) bloom in May-June in dense, spike-shaped clusters (racemes) to 8" long. Each flower has a single-petaled purple corolla and 10 protruding stamens with showy orange-yellow anthers. Flowers are followed by fruits in small, resinous-dotted, 1-2 seeded pods (to 1/2" long) which mature in July and August. This shrub grows much larger than Amorpha canescens (lead plant).
Genus name comes from the Greek word amorphos meaning without form in reference to the single-petaled flowers.
Specific epithet comes from the Latin word frutex meaning shrub in reference to its shrubby form.
Plants contain indigo pigment, but in quantities too small for commercial use (hence the common name of false indigo).