Bridges Evening-primrose (Tall Yellow Evening-primrose)
Oenothera longissima Family: Onagraceae (Evening-primrose Family) Perennial or biennial herbs; stems 7.9” to 5.9' (2 to 18 dm) tall or more Leaves: alternate and basal; simple; can be toothed; 0.8” to 14” (2 to 35 cm) long, 0.12” to 1.8” (0.3 to 4.5 cm) wide Flowers: 4 yellow petals; 4 sepals; 8 stamens; 4 lobed stigma; bisexual; usually radially symmetrical; fragrant; 1” to 2” (2.5 to 5 cm) long Pollinators: other Oenothera species are pollinated by bees, moths and butterflies Fruits: 4 chambered capsule Blooms in Arches National Park: April, May, June, July, August, September, October Habitat in Arches National Park: disturbed areas, riparian areas and hanging garden communities Location seen: lower and upper Courthouse wash Other: The genus name, “Oenothera”, means “wine-scented” and refers to the use of the roots in winemaking. The species name, “longissima”, refers to the long corolla tube or hypanthium. The type specimen was collected in 1911 in Natural Bridges National Monument in southeast Utah which is where one of the common names comes from. |
Did You Know?
Lizards, including the colorful collared lizard, are one of the most frequently seen animals at Arches. When not chasing flies or basking in the sun, they are often seen doing what appears to be push-ups. This odd dance might enhance their stereoscopic vision, helping them see what's looking back at them.