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| Kingdom | Plantae
– plantes, Planta, Vegetal, plants |
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| Subkingdom | Viridiplantae
– green plants |
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| Infrakingdom | Streptophyta
– land plants |
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| Superdivision | Embryophyta
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| Division | Tracheophyta
– vascular plants, tracheophytes |
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| Subdivision | Spermatophytina
– spermatophytes, seed plants, phanérogames |
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| Class | Magnoliopsida
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| Superorder | Asteranae
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| Order | Asterales
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| Family | Asteraceae
– sunflowers, tournesols |
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| Genus | Xylorhiza Nutt. – woodyaster, xylorhiza |
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Direct Children: |
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| Species | Xylorhiza cognata (H.M. Hall) T.J. Watson
– Mecca woodyaster | |
| Species | Xylorhiza confertifolia (Cronquist) T.J. Watson
– Henrieville woodyaster | |
| Species | Xylorhiza cronquistii S.L. Welsh & N.D. Atwood
– Cronquist's woodyaster | |
| Species | Xylorhiza glabriuscula Nutt.
– smooth woodyaster, woody aster, common woody aster | |
| Species | Xylorhiza orcuttii (Vasey & Rose) Greene
– Orcutt's aster | |
| Species | Xylorhiza tortifolia (Torr. & A. Gray) Greene
– Mojave woodyaster, Mojave aster | |
| Species | Xylorhiza venusta (M.E. Jones) A. Heller
– charming woodyaster | |
| Species | Xylorhiza wrightii (A. Gray) Greene
– Big Bend woodyaster | |
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