Mountain Indigo-bush
Amorpha glabra
Found in dry to moderately dry ridgetop and slope forests, primarily at low elevations around the higher Blue Ridge (such as eastwards in the Blue Ridge escarpment). FloraQuest, phone app (app page) What its natural habitat tells you
77
Strong
Native to Alabama. How scores work Is it native here?
Profile 100%
- Height
- About 16 feet
- Light
- Partial shade, Full sun
- Soil moisture
- Dry to moist
At a glance
- Leaves
- Deciduous
- Bloom
- May to July
- Fruiting season
- July to October
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Not yet recorded · Spread · Life cycle
Recorded in 19 Alabama counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
Ecological relationships
Who uses this plant?
26CaterpillarsGenus host records with ranges including AL
Genus host records with ranges including AL · Amorpha
- Epargyreus clarusSilver-spotted Skipper
- Achatia distinctaDistinct Quaker
- Agonopterix argillaceaClay-Colored Agonopterix
- Archips argyrospilaFruit-Tree Leafroller Moth
- Automeris ioIo Moth
- Catocala amestrisThree-Staff Underwing
- Catocala consorsThe Consort
- Catocala habilisHabilis Underwing
- Catocala illectaMagdalen Underwing
- Cecropterus lyciadesHoary Edge
Show all 26
- Cecropterus pyladesNorthern Cloudywing
- Choristoneura rosaceanaOblique-Banded Leafroller Moth, Rosaceous Leaf Roller
- Dasylophia anguinaBlack-Spotted Prominent
- Hypena scabraGreen Cloverworm Bomolocha, Black Snout
- Iridopsis ephyrariaPale-Winged Gray
- Lithophane antennataAshen Pinion
- Pandemis limitataThree-Lined Leafroller Moth
- Parectopa robiniellaLocust Digitate Leafminer
- Platynota rostranaOmnivorous Platynota
- Pleuroprucha insulsariaCommon Tan Wave
- Schinia lucensAmorpha Flower Moth, Leadplant Moth, Flase Indigo Flower Moth
- Strymon melinusGray Hairstreak
- Uresiphita reversalisGenista Caterpillar, Genista Cbroom Moth
- Zerene cesoniaSouthern Dogface
- Sinoe robiniella
- Sitochroa dasconalis
27BeesSoutheastern regional records
Southeastern regional records · Amorpha
Individual names are not available yet.
Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
3Specialist beesPollen specialists
Pollen specialists · Amorpha
- Andrena cragini
- Colletes susannae
- Hoplitis micheneri
—BirdsRecorded genus food-resource interactions; not a state feeding claimNo records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects
Growing and identification
Plant details
- Family
- Fabaceae
- Flower color
- Purple
- Growth rate
- Moderate
- Growth habit
- Several stems
- Foliage color
- Green
- Fruit begins
- July
- Fruit ends
- October
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “May to July” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Flower color · “Purple” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Foliage color · “Green” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit begins · “July” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Fruit ends · “October” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Growth habit · “Several stems” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth rate · “Moderate” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Height · “About 16 feet” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Leaf retention · “Deciduous” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Light · “Partial shade; Full sun (documented habitat)” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) · Carolinas and Georgia
- primary_flower_color · “purple” · USDA PLANTS
- Soil · “Dry; Moist (documented habitat)” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) · Carolinas and Georgia
Also known as
Appalachian Indigo Bush; Mountain Indigo Bush
Conservation status
| Alabama rank | S3S4 |
|---|---|
| Global rank | G4? |
| AL status | Not verified |
| Federal status | Not verified |
In your garden
Will it fit your yard?
Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.
Choose a county to begin.
Sources
- Alabama Plant Atlas
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- FloraQuest: Carolinas, Georgia (Weakley), phone app (app page)
- FloraQuest: South Central (Weakley), phone app (app page)
- NatureServe Explorer
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications