Mimosa pigra

Non-Native to Florida

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Download a page (PDF 165 KB) from Identification and Biology of Nonnative Plants in Florida’s Natural Areas – Second Edition, by K.A. Langeland, H.M. Cherry, et al. University of Florida-IFAS Pub SP 257. 2008.

For control information, see Integrated Management of Nonnative Plants in Natural Areas of Florida (SP 242) by K. A. Langeland, J. A. Ferrell, B. Sellers, G. E. MacDonald, and R. K. Stocker

This species is listed on the FL DACS Florida Noxious Weed List – Rule 5B-57.007, making it “. . . unlawful to introduce, multiply, possess, move, or release . . . except under permit issued by the department . . . .” See 5B-57.004 for more information. It is also on the FL DACS Prohibited Aquatic Plant List – 5B-64.011. According to Florida Statute 369.25, “No person shall import, transport, cultivate, collect, sell, or possess any noxious aquatic plant listed on the prohibited aquatic plant list established by the department without a permit issued by the department.” See 5B-64.011 for more information.

Date of introduction to Florida: 1926 (ornamental)

(from Strangers in Paradise, Impact and Management of Nonindigenous Species in Florida, Chapter 2: Florida’s Invasion by Nonindigenous Plants: History, Screening, and Regulation, by D.R. Gordon and K.P. Thomas, pp. 21-37. Island Press, Washington, DC, 1997.)

Mimosa pigra is rarely found growing in wet, disturbed sites in Highlands, Okeechobee, Martin, Broward and Palm Beach counties. It is native to tropical America and blooms from spring to summer (Wunderlin, 2003).

Appearance: Sprawling, often thicket-forming shrub to 6 m (20 ft) tall, with hairy stems bearing numerous recurved prickles to 7 mm (0.3 in) long.

Leaves: Alternate, twice compound, sensitive to touch; leaf petiole and rachis to 20 cm (8 in) long, prickles at junctions, 5–12 pairs of pinnae; each pinna with 24–31 pairs of leaflets, these to 8 mm (0.3 in) long, often with threadlike hairs on margins.

Flowers: Small, mauve to pink, in stalked, dense, spherical heads; about 1 cm (0.5 in) across, with about 100 flowers per head; 8 stamens.

Fruit: A brown-bristly, segmented, flat pod to 8 cm (3 in) long and 1.4 cm (0.5 in) wide, with the 9–24 segments breaking free individually; each containing a seed. Pods in clusters, or “hands” (of usually 7) at stem tips.

Ecological threat: Has formed dense understories in swamps, shading out native tree seedlings and altering bird, reptile, and vegetation communities. FLEPPC Category I

Distribution: C, SW, SE

Text from Invasive and Non-Native Plants You Should Know, Recognition Cards, by A. Richard and V. Ramey, 2007. UF/IFAS Center for Aquatic and Invasive Plants, Publ. No. SP 431.

Download the Recognition Card (PDF 517 KB).

 

See the UF/IFAS Assessment, which lists plants according to their invasive status in Florida.

View the herbarium specimen image of the University of Florida Herbarium Digital Imaging Projects.

Financial support for this web page provided by the St. Johns River Water Management District (FL).