Showy Rattlebox
Crotalaria spectabilis
In the Carolinas and Georgia, found in fields, roadsides, disturbed areas. Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition What its natural habitat tells you
Not native to Arkansas. How scores work Is it native here?
Profile 82%
- Height
- About 5 feet
- Light
- Full sun
- Soil moisture
- Dry to moist
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At a glance
- Life cycle
- Annual or biennial
- Bloom
- Mid summer
- Fruiting season
- Summer to fall
Not yet recorded · Spread · Leaves
Recorded in 2 Arkansas counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
Roadsides, fields and disturbed ground
Ground opened by people: roadsides, old fields, pastures, fencerows and lots.
Who uses this plant?
8CaterpillarsGenus host records with ranges including AR
Genus host records with ranges including AR · Crotalaria
- Amyna strictaEight-Spot Moth
- Callophrys irusThe Hoary Elfin, Bog Elfin?, Frosted Elfin
- Gesta baptisiaeWild Indigo Duskywing, Baptisia Duskywing
- Helicoverpa zeaCorn Earworm Moth
- Phoebis sennaeCloudless Sulphur
- Selenisa sueroidesTailpipes, Pale-Edged Selenisa Moth
- Spodoptera frugiperdaFall Armyworm Moth
- Utetheisa ornatrixOrnate Moth, Pink Underwing, Rattlebox Moth, Bella Moth
—BeesSoutheastern regional records
—Specialist beesPollen specialists
2BirdsRecorded genus food-resource interactions; not a state feeding claim
Recorded genus food-resource interactions; not a state feeding claim · Crotalaria
- Columbina passerinaCommon Ground Dove
- Zenaida macrouraMourning Dove
Direct food only: birds recorded eating this genus across North America. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening
Plant details
- Family
- Fabaceae
- Hardiness
- Zones 9a–11b
- Soil pH
- Acidic to alkaline
- Flower color
- Yellow
- Growth rate
- Rapid
- Growth habit
- Single crown
- Foliage color
- Green
- Fruit begins
- Summer
- Fruit ends
- Fall
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “Mid summer” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Flower color · “Yellow” · NC Extension Plant Toolbox
- Foliage color · “Green” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit begins · “Summer” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit ends · “Fall” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth habit · “Single crown” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth rate · “Rapid” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Hardiness · “Zones 9a–11b” · NC Extension Plant Toolbox
- Height · “About 5 feet” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Life cycle · “Annual or biennial” · NC Extension Plant Toolbox
- Light · “Full sun (6 or more hours of direct sunlight a day)” · NC Extension Plant Toolbox
- primary_flower_color · “yellow” · USDA PLANTS
- Soil · “Dry; Moist (documented habitat)” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
- Soil pH · “Acidic to alkaline” · NC Extension Plant Toolbox
Conservation status
| Arkansas rank | SNA |
|---|---|
| Global rank | GNR |
| AR status | Not verified |
| Federal status | Not verified |
Sources
- Atlas of the Vascular Plants of Arkansas (2013)
- USDA PLANTS
- Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition
- NatureServe Explorer
- Arkansas occurrence source
- 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