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Epilobium ciliatum Raf.

Northern willowherb, slender willow herb, fringed willowherb, willowherb, American willow-herb, northern willhowherb

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderMyrtalesIncludes myrtles, leadwoods, loosestrifes, pomegranates, evening primroses, many others
FamilyOnagraceaeWillowherb/evening primrose family
GenusEpilobiumFrom Greek epi, “upon,” and lobos, “a pod or capsule,” because the flower is attached directly to the ovary
SpeciesciliatumName given to indicate a slight fringing like an eyelash that might occur on petals, leaves, petioles or other plant parts

About plant names...

Northern willowherb is named for the lacy tuft of white hairs that surrounds its seeds. It is native throughout most of North America, along with eastern Asia. It also prospers in Eurasia and Australia, where it was introduced as has become naturalized.

Identification: Plants are between 4-6′ (1.2-1.8 m) in height. Leaves are up 6″ (15 cm) long at the base, narrow, dark green or reddish, with deep sunken veins. Flowers are pink, trumpet-shaped, with four petals, each separated into two lobes. Petals are often darker pink at the edges. Sometimes the flowers are white or cream-colored. They are about 1-4″ (3-10 cm) long.

Epilobium ciliatum (northern willowherb, slender willow herb, fringed willowherb, willowherb, American willow-herb, northern willhowherb)

Each petal has two lobes.

Online References:

Wildflowers, Ferns & Trees of Colorado, New Mexico, Arizona, and Utah

Calflora

Montana Plant Life

Vascular Plants of the Gila Wilderness

CalPhotos

The Lady Bird Johnson Wildflower Center

EFloras

 

Epilobium ciliatum description by Thomas H. Kent, last updated 25 May 2020.

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Epilobium ciliatum (northern willowherb, slender willow herb, fringed willowherb, willowherb, American willow-herb, northern willhowherb)

7/15/2012 · Fort Point State Park, Stockton Springs, Maine · ≈ 11 × 7″ (27 × 18 cm) ID is uncertain

Epilobium ciliatum (northern willowherb, slender willow herb, fringed willowherb, willowherb, American willow-herb, northern willhowherb)

1/10/2012 · Tom Paul Trail, Westford, Mass­a­chu­setts · ≈ 11 × 7″ (27 × 18 cm) ID is uncertain

Epilobium ciliatum (northern willowherb, slender willow herb, fringed willowherb, willowherb, American willow-herb, northern willhowherb)

11/7/2009 · Nashua River Rail Trail, Groton Center, Groton, Mass­a­chu­setts ID is uncertain

Epilobium ciliatum (northern willowherb, slender willow herb, fringed willowherb, willowherb, American willow-herb, northern willhowherb)

7/15/2012 · Fort Point State Park, Stockton Springs, Maine · ≈ 7 × 11″ (18 × 27 cm) ID is uncertain

Epilobium ciliatum (northern willowherb, slender willow herb, fringed willowherb, willowherb, American willow-herb, northern willhowherb)

9/20/2009 · Wild Gardens of Acadia, Acadia National Park, Bar Harbor, Maine · ≈ 1½ × 1′ (52 × 34 cm)

Range:

About this map...