Antioch Dunes Evening Primrose

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Antioch_dunes_evening_primrEvening Primrose The Antioch Dunes evening primrose (Oenothera deltoides howellii) is a flowering plant in the primrose family that grows in sandy, disturbed soils. The primrose’s blooms consist of four snow-white, heart-shaped petals surrounding a cluster of bright yellow stamens where the flower’s pollen is stored. This and other primrose species rely on moths and bees to pollinate their showy flowers and fertilize their developing seeds which need open sand dunes to germinate and grow from seedlings into mature plants. The Antioch Dunes evening primrose is a short-lived perennial, relying on pollinators to help it survive beyond the two to three-year lifespan of each individual plant. The Antioch Dunes evening primrose is either a food or larval host plant for several insect species, including halictid bees and sphinx moths. Although the Antioch Dunes evening primrose is naturally endemic to the Antioch Dunes and survives there today, small populations have also been planted elsewhere in the region, including introduced populations on two neighboring islands and at Point Reyes.

Antioch Dunes Evening Primrose Listing Status: Federally Endangered

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