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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 | Saxifraganae
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| Order | Saxifragales
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| Family | Saxifragaceae
– saxifrages, saxifragacées |
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| Genus | Boykinia Nutt. – brookfoam |
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Direct Children: |
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| Species | Boykinia aconitifolia Nutt.
– Allegheny brookfoam, brook saxifrage | |
| Species | Boykinia intermedia (Piper) G.N. Jones
– Sierra brookfoam | |
| Species | Boykinia major A. Gray
– large boykinia | |
| Species | Boykinia occidentalis Torr. & A. Gray
– coast boykinia, coastal brookfoam | |
| Species | Boykinia richardsonii (Hook.) Rothr.
– Alaska boykinia, bear flower, Richardson's brookfoam | |
| Species | Boykinia rotundifolia Parry ex A. Gray
– roundleaf brookfoam | |
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