// SPECIES PROFILE · ANNUAL · NATIVE

American bird's-foot trefoil

Lotus unifoliolatus var. unifoliolatus

American bird's-foot trefoil (Lotus unifoliolatus var. unifoliolatus) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–11a. Mature size 6"–2'. Blooms May–Sep.

// QUICK FACTS

Family: —
Group: annual
Native range: Native to 30 U.S. states, including AL, AR, AZ, CA, CT, GA…
USDA hardiness: Zones 2a–11a
Mature size: 6"–2'
Sun: —
Water: —
Bloom: May–Sep
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

American bird's-foot trefoil (Lotus unifoliolatus var. unifoliolatus) — *Lotus unifoliolatus var. unifoliolatus* — American bird's-foot trefoil. Photo via iNaturalist — (c) Dustin Snider, some rights reserved (CC BY).

Field Notes

[ growing · ecology · siting · care ]

Why it's on this list: native species profile. Native-range data from the Lady Bird Johnson Wildflower Center (NPIN), cross-checked against iNaturalist observations. Part of Rooted Revival's regional native plant catalog — true natives for Oklahoma, Arkansas, Missouri and Kansas.

Companion Planting

[ guild · polyculture · cross-layer pairings ]

In the same native range, american bird's-foot trefoil pairs naturally with: Common Sunflower (Helianthus annuus), Swamp verbena (Verbena hastata), Annual ragweed (Ambrosia artemisiifolia var. artemisiifolia), Lambsquarters (Chenopodium album).