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Photographer: PNW Weed Management Handbook
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Family Asteraceae
Xanthium spinosum L.
spiny cocklebur
Xanthium: from a Greek word meaning "yellow"
spinosum: spiny
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| Status: | Introduced - adventive |
| Plant: | erect, annual, 1'-4' tall forb with rough stems |
| Flower: | head green; inflorescence of 1 to a few heads in leaf axils; blooms July-Oct. |
| Fruit: | thick dry seeds, clustered in a 1/3" cylindrical bur with thin hooked prickles |
| Leaf: | lance-like, tapering to base, silvery beneath, with 1/3" - 3/4" yellow spine in the axils |
| Habitat: | disturbed sites |
| (Glossary) |
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Barry A. Rice/The Nature Conservancy&spcode=XANSPI)
John M. Randall/The Nature Conservancy&spcode=XANSPI)
John M. Randall/The Nature Conservancy&spcode=XANSPI)
