Oenothera nuttallii
White Evening-Primrose
Flower Bud
Douglas Provincial Park
26-July-2008
Nuttallii: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species.
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Oenothera: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus.
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Onagraceae: Answers to key questions in Budd's Flora leading to this family.
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