Swaziland's Alien Plants Database

Robinia pseudoacacia L.
Black locust
Invasive, Potential problem species
Origin: North America (Central and Eastern USA)
Growth Form: Tree
Plant Description: Plant: Deciduous tree 3–12(–25) m high with an oval or rounded crown; bark dark brown, deeply furrowed; suckers freely and often forms thickets; young stems and branchlets armed with short, paired spines. Leaves: Bright green above, paler beneath, glabrous, pinnate, with yellow autumn tints. Flowers: White, fragrant, in pendulous sprays 100–200 mm long, September–November. Fruit: Reddish-brown pods, thin, remaining on tree over winter.
Key Features:
Control: systemic products such as foliar spray
Comments: Suspected/Possible
More information:
Plant Conservation Alliance - Alien Plants Fact Sheets
NRCS Plants Database

Photo - flowers/leaves

Jennifer Anderson @ USDA-NRCS PLANTS Database


USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada.

Photo - flowers/leaves

Larry Allain @ USDA-NRCS PLANTS Database

Photo - bark

Paul Wray, Iowa State University

Photo - flowers/leaves

Paul Wray, Iowa State University

Photo - pods/leaves

Paul Wray, Iowa State University

Photo - spines

Bill Cook, Michigan State University

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