Alnus rubra, the red alder, is a deciduous broadleaf tree native to western North America (Alaska, Yukon, British Columbia, Washington, Oregon, California, Idaho and Montana). 展开

The name derives from the bright rusty red color that develops in bruised or scraped bark. 展开

Alnus rubra grows from Southeast Alaska to central coastal California, nearly always within about 200 kilometres (120 mi) of the Pacific coast, … 展开

As dye
A russet dye can be made from a decoction of the bark, apparently due to the tannin it contains, and was used by Native Americans to … 展开

Alnus rubra is the largest species of alder in North America and one of the largest in the world, reaching heights of 20 to 30 metres (66 to 98 ft). The official tallest red alder (as of 1979) stands 32 m (105 ft) tall in Clatsop County, Oregon (US). The trunks range from 25 to 50 … 展开

In southern Alaska, western British Columbia and the northwestern Pacific Coast Ranges of the United States, red alder grows on cool and moist slopes; inland and at the southern … 展开

• Male catkins with tiny female catkins above
• Stump
• Seeds
• Habitat in … 展开