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American deerweed

Acmispon americanus

Last reviewed: August 2026

American deerweed (Acmispon americanus)
Photo: (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda

Light

full sun

Water

low

Size

4"–20" H × 6"–12" W

Bloom

Apr, May, Jun, Jul

Native to

AL, AR, AZ, CA and 20 more states

Pollinators

bees

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A slender, sprawling annual legume with small trifoliate leaves and tiny white to pinkish pea flowers borne singly along the stems. Widespread as a low, informal groundcover on open disturbed ground and grasslands.

Wildlife value

Host plant for silvery blue.

As a nitrogen-fixing legume it enriches soil, and its foliage serves as a larval host for silvery blue butterflies.

Common questions

How much sun does American deerweed need?
American deerweed grows best in full sun conditions.
When does American deerweed bloom?
American deerweed blooms in April, May, June, and July.
Where is American deerweed native?
American deerweed (Acmispon americanus) is native to AL, AR, AZ, CA and 20 more states, per the World Checklist of Vascular Plants (Kew).
What butterflies or moths does American deerweed host?
American deerweed is a larval host plant for silvery blue.

Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

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