Prairie Acacia

(Acaciella angustissima)

Prairie Acacia (Acaciella angustissima)

Nolan Exe

CC BY 4.0

Image By: Nolan Exe

Recorded By:

Estimated Native Range

Summary

Acaciella angustissima, commonly known as Prairie Acacia, is a deciduous perennial herb that is part of the legume family. It is native to a variety of habitats including prairies, grasslands, and open woodlands in the central and southern United States, as well as Mexico, Central and South America. This plant typically grows to a height of 6-23 feet and a width of 7-15 feet, starting as a shrub and eventually maturing into a small tree. The Prairie Acacia is characterized by its large clumps of small, fragrant white flowers that bloom in the summer, with each flower consisting of 5 petals and numerous stamens that extend well beyond the petals. The plant also produces a small, brown seedpod upon maturity. Its foliage is distinctive, with 10–20 pairs of long, thin leaflets arranged along a stem, grouped in sets of 3–12. Notably, Acaciella angustissima is thornless, which is unusual for its genus.

This plant is valued for its ability to prevent soil erosion due to its extensive root system, making it an excellent choice for restoration projects and naturalized areas. It is also appreciated for its low maintenance requirements, as it is self-sustaining and responds well to fertilization, though it is not necessary. Prairie Acacia is drought-tolerant once established and thrives in full sun to part shade, requiring low amounts of water and well-drained, slightly acidic soil. It is often used in xeriscaping, wildlife gardens, and as an ornamental in residential landscapes. Gardeners should note that while it is moderately drought-tolerant, it does have a significant water requirement during establishment. Potential issues include sensitivity to overwatering and root rot if planted in poorly drained soils.CC BY-SA 4.0

Plant Description

Plant Type: Subshrub, Herb
Height: 6-23 feet
Width: 7-15 feet
Growth Rate: Rapid
Flower Color: White
Flowering Season: Summer, Fall
Leaf Retention: Deciduous

Growth Requirements

Sun: Full Sun, Part Shade
Water: Medium, High
Drainage: Fast

Common Uses

Butterfly Garden, Drought Tolerant, Erosion Control, Low Maintenance, Rock Garden

Natural Habitat

native to a variety of habitats including prairies, grasslands, and open woodlands in the central and southern United States, as well as Mexico, Central and South America

Other Names

Common Names: White-Ball Acacia, Fern Acacia, Cantemó, Guajillo, Palo De Pulque, Ocpatl, Barbas De Chivo

Scientific Names: , Acaciella angustissima, Acacia angustissima, Acacia angustissima var. angustissima, Acaciella angustissima var. filicoides, Acacia filicoides, Acacia hirta, Mimosa angustissima, Acacia angustissima subsp. angustissima, Acacia angustissima subsp. typica

GBIF Accepted Name: Acaciella angustissima (Mill.) Britton & Rose