Shrubs of Wisconsin
| Robinia
hispida L. birstly locust Family: Fabaceae |
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Robinia hispida can be recognized by the compound alternate leaves
and bristly stems with stronger paired
thorns at the nodes. The similar Robinia pseudoacacia lacks
the bristles on the branches and has broader-based, paired thorns at the
nodes. Plants are small, generally less than 3 meters tall, and spread
vegetatively to form conspicuous clones.
Robinia hispida is an alien species planted for decoration, and escaping locally. It appears that it is invasive, especially on sandy soils. The known distribution in Wisconsin is limited, but it appears to be spreading and it should probably be removed where it escapes from cultivation. In addition to the documented locations shown on the map, I have also seen it in Door and Marinette counties. |
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