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Evening Primrose
The Showy Evening Primrose (Oenothera caespitosa) has beautiful
snow white, four inch flowers, turning pink during the day and fading by
evening.
Dixie Rose, in her book "Utah's Intermountain Wildflowers", calls it
"A favorite with children, and adults too. A tufted stemless plant with
leaves pinnately notched. Four white petals, one or two inches. They open
towards evening, turn rose by morning. The long calyx is sometimes mistaken
for a stalk. The Rockies have about 25 species of Evening Primrose."
Another one we might see in our area is the Pale Evening Primrose,
(Oenothera pallida). In "Mountain Plants of Northeastern Utah",
from Utah State University, we are told, "The Pale Evening Primrose is a
perennial that grows about twenty inches tall, and has creeping root
stalks. Its stems are white and exfoliating. The flowers, two to three
inches across, are white, turning rose as they fade. They, like other
evening primroses, bloom at night and are very fragrant. Look for them on
dry, sandy hillsides and washes."
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