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Phylogeny of Eschscholzia and its relatives
+-Dendromecon rigida
+----------------+-Dendromecon harfordii
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| +------------Hunnemannia fumariifolia
----+ |
| | +-Eschscholzia californica
| | +---+-Eschscholzia caespitosa
+-----+ | +-Eschscholzia ramosa
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| +-----Eschscholzia lobbii
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| | +-Eschscholzia parishii
+------+---+-Eschscholzia glyptosperma
| +-Eschscholzia minutiflora
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| +-Eschscholzia lemmonii
+---+-Eschscholzia hypecoides
| +-Eschscholzia rhombipetala
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+---+-Eschscholzia elegans
+-Eschscholzia palmeri
Relationships among the three genera are supported by both morphological and molecular evidence. Relationships among the species of Eschscholzia are based on morphology, and are tentative.
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