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Largeflower spike-primrose

Epilobium pallidum

Largeflower spike-primrose is a native annual wildflower of the western US that grows in moist, open ground. It is best suited to damp, sunny spots in cool temperate gardens, where it self-seeds readily.

Family
Onagraceae (Evening-primrose family)
Grows as
Annual
Light
Full sun, Part shade
Water
Keep soil consistently moist during the growing season, but avoid waterlogging.
Soil
Moist, well-drained loam or sandy loam.
Temperature
10–24 °C; tolerates light frost but not hard freezes
How easy
Easy
Native range
SW. Oregon and Idaho to California
Climate
temperate

About

Epilobium pallidum is a species of flowering plant in the evening primrose family known by the common name largeflower spike-primrose. It is native to western United States, where it grows in moist areas in northern California, Oregon, and Idaho. It is an annual herb producing a narrow, upright stem up to 60 centimeters (24 in) long lined with narrow oval leaves each up to 5 centimeters in length. The inflorescence atop the stem bears several flowers and hairy, leaflike bracts. Each flower has four bilobed petals each up to about a centimeter long and bright pink in color. The fruit is a beaked capsule between 1 and 2 centimeters long containing a row of tiny seeds.

Other Epilobium plants

Whorled Leaved Willowherb · Chickweed Willowherb · Pimpernel willowherb · Aboriginal willowherb · Tall annual willowherb · New Zealand Willowherb · Hummingbird trumpet · Fringed willowherb · Talus willowherb · Selfing willowherb · Hill Willowherb · Purpleleaf willowherb

Text excerpted from the Wikipedia article Epilobium pallidum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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