Amorpha nana Nutt.
Dwarf False Indigo, Fragrant Indigo-bush, Fragrant False Indigo, Dwarf Wild Indigo
Fabaceae (Pea Family)
USDA Symbol: AMNA
Fragrant indigo-bush is a low-growing shrub, 1-3 ft. tall. Its finely textured, pinnately compound foliage gives a cloud-like appearance. Dense, terminal racemes of purple, pea-like flowers with showy, orange anthers are showcased against the bright-green leaflets.
The genus name, from the Greek amorphos (formless or deformed), alludes to the fact that the flower, with only a single petal (the banner or standard), is unlike the typical pea flowers of the family.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Leaf Retention: Deciduous
Leaf Arrangement: Alternate
Leaf Complexity: Pinnate
Fruit Type: Legume
Size Notes: Up to about 3 feet tall.
Bloom InformationBloom Color: Purple , Violet
Bloom Time: May , Jun , Jul
DistributionUSA: CO , IA , KS , MN , ND , NE , NM , OK , SD
Native Distribution: S. Man. to IA, w. to Sask. & NM
Native Habitat: Dry prairies; rocky hillsides
Growing ConditionsLight Requirement: Sun , Part Shade , Shade
Soil Moisture: Dry , Moist
Drought Tolerance: High
Soil Description: Rocky or sandy soils.
BenefitConspicuous Flowers: yes
Value to Beneficial InsectsSpecial Value to Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationDescription: Propagation is possible by seed. Seedlings are slow-growing.
Seed Collection: Extraction of seeds from the pod is not necessary as the pods do not inhibit germination.
Seed Treatment: If seeds are stored, a 10-minute, hot water soak will improve germination. Moist stratification for three weeks at 40 degrees may also improve germination.
Commercially Avail: yes
National Wetland Indicator Status
BibliographyBibref 946 - Gardening with Prairie Plants: How to Create Beautiful Native Landscapes (2002) Wasowski, Sally
Search More Titles in Bibliography
Web ReferenceWebref 26 - Minnesota Wildflowers: a field guide to the flora of Minnesota (2009)
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resourcesUSDA: Find Amorpha nana in USDA Plants
FNA: Find Amorpha nana in the Flora of North America (if available)
Google: Search Google for Amorpha nana
MetadataRecord Modified: 2022-11-11
Research By: TWC Staff