• South Window

    Arches

    National Park Utah

Eaton's Penstemon (Scarlet-bugler Penstemon)

Penstemon eatonii

Penstemon eatonii

Family: Scrophulariaceae - Figwort Family

Perennial herbs; some parasitic or semi-parasitic; 9.84” to 3.3' (2.5 to 10 dm) tall

Leaves: opposite and basal; simple; entire or curled or wavy; lower leaves 1.2” to 7.6” (3 to 19 cm) long, 0.32” to 2.2” (8 to 55 mm) wide

Flowers: 5 united lobed tubular (irregular flowers with upper lip 2 lobed, lower lip 3 lobed) red petals; 5 sepals; 4 fertile stamens, a fifth stamen is sterile; flowers hanging downwards; flowers 0.6” to 1.32” (15 to 33 mm) long

Pollinators: hummingbirds; other genera in this family are pollinated by insects (specifically bees, flies, moths and butterflies)

Fruits: 2 chambered capsule (dry fruit)

Blooms in Arches National Park: April, May, June

Habitat in Arches National Park: desert shrub and pinyon-juniper communities

Location seen: park road mile 0 to 2.5, Park Avenue, Delicate Arch trail, Fiery Furnace

Other: The genus name, “Penstemon”, is from the Greek “pen” which means “almost” and “stemon” which means “thread” which refers to the stamens (only 4 of the 5 stamens produce pollen; the fifth stamen is sterile, so it is almost a stamen). The species name, “eatonii”, honors David Cady Eaton (1834-1885), an American botanist.

The genus Penstemon is large and complex. The family is important because it has many ornamentals and cardiac glycosides can be derived from foxglove.

Did You Know?

Graffiti-free Zone

Even though graffiti is prohibited by law, rangers and volunteer groups spend hundreds of hours every year removing it in Arches. Please join us in protecting the park by not leaving your mark. If you discover graffiti in the park, please let us know. Otherwise, make memories, take pictures, but leave no visible trace of your visit. More...