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Yuba Pass willowherb

Epilobium howellii

Also called Subalpine Fireweed

Yuba Pass willowherb
Photo: Dean Wm. Taylor, CC BY 2.0

Yuba Pass willowherb is a small, uncommon perennial herb from wet subalpine meadows in the High Sierra Nevada of California, rarely grown in gardens. Its key requirement is cool, consistently moist conditions similar to its native meadows.

Family
Onagraceae (Evening-primrose family)
Grows as
Perennial
Light
Full sun, Part shade
Water
Keep soil consistently moist, never allowing it to dry out completely.
Soil
Moist, organic-rich, well-drained loam or meadow-type soil.
Temperature
10–20 °C suits it best; protect from prolonged heat above 27 °C.
How easy
Hard
Native range
California (Sierra Nevada)
Climate
temperate

About

Epilobium howellii is an uncommon species of flowering plant in the evening primrose family known by the common names Yuba Pass willowherb and subalpine fireweed (though it is not a true fireweed). It is endemic to the High Sierra Nevada of California, where it is known from only about 65 occurrences.

It grows in wet mountain habitat such as meadows, often in the presence of mosses and willows, between 2,000 and 2,700 meters (6,600 and 8,900 ft) in elevation. The plant was first collected in 1975 at Yuba Pass on Highway 49 in Sierra County, California, and described to science as a new species in 1992.

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 howellii 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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