Illinois Tick Trefoil
Desmodium illinoense
Last reviewed: June 2026
Light
full sun
Water
medium
Size
24"–48" H × 12"–24" W
Bloom
Jul, Aug, Sep
Native to
AZ, IA, IL, IN and 5 more states
Pollinators
bees, butterflies
Illinois tick trefoil is a native wildflower that produces small pink to purple pea-like flowers in clusters during late summer. This upright perennial has three-part leaves and develops sticky seed pods that can attach to clothing and fur. It thrives in sunny locations and adds late-season color when many other plants are declining.
In an HOA neighborhood
Illinois Tick Trefoil takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Sticky seed pods create mess and attach to clothing
- Can appear weedy and informal in structure
- May self-seed aggressively in favorable conditions
Wildlife value
The flowers attract native bees, butterflies, and other pollinators during the late summer blooming period. Seeds provide food for birds and small mammals.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does Illinois Tick Trefoil fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.