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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 | Cirsium Mill.
– thistle |
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| Species | Cirsium scariosum Nutt. – meadow thistle |
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Direct Children: |
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| Variety | Cirsium scariosum var. americanum (A. Gray) D.J. Keil
– dinnerplate thistle, sessile thistle, stemless thistle, Tioga thistle | |
| Variety | Cirsium scariosum var. citrinum (Petr.) D.J. Keil
– La Graciosa thistle | |
| Variety | Cirsium scariosum var. coloradense (Rydb.) D.J. Keil
– Colorado thistle, summer thistle, glory thistle | |
| Variety | Cirsium scariosum var. congdonii (R.J. Moore & Frankton) D.J. Keil
– rosette thistle | |
| Variety | Cirsium scariosum var. robustum D.J. Keil
– Shasta Valley thistle | |
| Variety | Cirsium scariosum var. scariosum Nutt.
– meadow thistle | |
| Variety | Cirsium scariosum var. thorneae S.L. Welsh
– meadow thistle | |
| Variety | Cirsium scariosum var. toiyabense D.J. Keil
– Toiyabe thistle | |
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