Pursh's Rattlebox
Crotalaria purshii
- Native to:
- Mexico, United States
iNaturalist: © fountainfungi (iNaturalist #282926409)






Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Fabaceae
- Genus:
- Crotalaria
- Species:
- Crotalaria purshii
- USDA Symbol:
- CRPU5
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 60 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- may,jun,jul,aug,sep
- Bloom Colors:
- yellow
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Host Plant for Caterpillars
Bella Moth (Utetheisa bella), corn earworm (Helicoverpa zea), 🛑Frosted Elfin (Incisalia irus), Wild Indigo Duskywing (Erynnis baptisiae)
Garden & Ecology Notes
- Wildlife Value:
- bees, butterflies
- Deer Resistant:
- Yes
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Native to fire-maintained sandhills and pine flatwoods; resprouts from root crown following fire.
Soil Requirements
- Soil Type:
- sandy, well-drained, nutrient-poor soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to open, sandy areas; tolerates poor soil fertility
Propagation & Germination
- Stratification:
- None required
- Scarification:
- Seed coat scarification required before sowing
- Germination Time:
- 14–30 days
- Notes:
- Hard seed coat requires scarification; hot water treatment or mechanical scarification improves germination rates.
The above propagation data sourced from Claude AI