Willowherb(6)

Alpine Willowherb
Epilobium anagallidifolium

Family: Evening Primrose (Onagreaceae)
AKA: Pimpernel Willowherb
Photo taken on: July 4, 2007
Location: Poverty Gulch, GV, CO
Life Zones: Subalpine to alpine
Habitat: Wet areas, stream sides

Grow only to 8" in a tuft with runners and reddish stems. Leaves are bright green and slightly toothed. Tiny (¼") pink flowers have four, notched petals.

Flora of North America reference.

Tall Annual Willowherb
Epilobium brachycarpum

Family: Evening Primrose (Onagreaceae)
AKA: Tall Willowherb, Autumn Willowherb
Photo taken on: July 4, 2019
Location: Almont, CO
Life Zones: Plains to subalpine
Habitat: Dry, open disturbed areas

Can grow up to 6 feet tall in an airy pattern with long, slender, branched, green stems and narrow, folded leaves close to the stem. The flowers are white to rose pink with darker veins and from ¼" to 1" across. The 4 petals are so deeply notched they give the appearance of there being 8. The seed pods are up to 1" long.

Flora of North America reference.

Fringed Willowherb
Epilobium ciliatum

Family: Evening Primrose (Onagreaceae)
AKA: Northern Willowherb, Sticky Willowherb,
 American Willowherb
Photo taken on: August 9, 2012
Location: Rio Chama Recreation Area, NM
Life Zones: Plains to montane
Habitat: Moist areas, stream sides

Grows up to 3ft tall, branched towards the top with fleshy, finely toothed leaves. The flowers are white to pale pink and up to ½" across. The petals are deeply notched. The up to 4" long seed pods and flower buds have fine hairs.

Flora of North America reference.

Glandular Willowherb
Epilobium hallianum

Family: Evening Primrose (Onagreaceae)
AKA: Hall's Willowweed
Photo taken on: July 24, 2021
Location: Roaring Judy Fish Hatchery, GV, CO
Life Zones: Plains to montane
Habitat: Moist meadows, stream sides

Grows 2" to 10" high with sparse, narrow leaves compared to other Willowherbs. Lower leaves are oval-shaped, upper lance-shaped. The flowers are white to pale pink and up to ½" across. The petals are notched. The seed pods are up to 1 1/2" long.

Flora of North America reference.

Hornemann's Willowherb
Epilobium hornemannii

Family: Evening Primrose (Onagreaceae)
AKA: Alpine Willowherb
Photo taken on: July 10, 2010
Location: Lily Lake Trail, GV, CO
Life Zones: Montane to subalpine
Habitat: Meadows, stream sides

The most common Willowherb grows to 12" with larger leaves and seed pods than Alpine Willowherb. The flowers are also slightly larger.

Flora of North America reference.

Milkflower Willowherb
Epilobium lactiflorum

Family: Evening Primrose (Onagreaceae)
AKA: Whiteflower Willowherb
Photo taken on: July 4, 2007
Location: Poverty Gulch, GV, CO
Life Zones: Montane to subalpine
Habitat: Moist areas, stream sides

Grows to 12" with smooth stems and long, toothed leaves. Flowers are tiny (¼") and white. The seed pod is up to 2" long.

Flora of North America reference.