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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 | Gentianales
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| Family | Apocynaceae
– dogbane, apocyns |
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| Genus | Asclepias L.
– milkweed |
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| Species | Asclepias cryptoceras S. Watson – Humboldt milkweed, pallid milkweed, cow cabbage, Humboldt Mountains milkweed |
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Direct Children: |
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| Subspecies | Asclepias cryptoceras ssp. cryptoceras S. Watson
– pallid milkweed, cow cabbage | |
| Subspecies | Asclepias cryptoceras ssp. davisii (Woodson) Woodson
– Davis' milkweed, pallid milkweed | |
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