Project
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Keys to Nature Project |
| Key to Eupatorium species |
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Title: Key to Eupatorium species |
| Version: 60 |
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| Author(s): Sean Boyle, Paul Rothrock |
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| Email: plrothrock@taylor.edu |
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| Description: |
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| Key Structure: 1. Leaves whorled - 2 1. Leaves opposite - 4 2. Inflorescences +/- flat-topped; flowers 9 or more per head - E. maculatum 2. Inflorescences not flat-topped;flowers 4-8 per head - 3 3. Stems purplish throughout - E. fistulosum 3. Stems purplish only at nodes - E. purpureum 4. Flowers blue, pink, or purple - E. coelestinum 4. Flowers white - 5 5. Leaves petiolate - 6 5. Leaves sessile or perfoliate - 7 6. Leaves lanceolate (at least 4 times longer than wide) - E. serotinum 6. Leaves ovate (1.5-2.5 times longer than wide) - E. rugosum 7. Leaves perfoliate - E. perfoliatum 7. Leaves not perfoliate - 8 8. Leaves lanceolate with one main vein - E. sessilifolium 8. Leaves linear to lanceolate with three parallel veins - E. altissimum |
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