Alnus rhombifolia

Alnus rhombifolia, also known as the white alder, is a species of alder that is native to western North America, from British Columbia and Montana south to San Diego County, California, and east to western Wyoming and New Mexico.

Description

The Alnus rhombifolia is a large shrub or medium-sized tree that grows up to 20 meters tall. It has a straight trunk with smooth, grey bark. The leaves are alternate, rhombic to elliptic, 4–10 cm long, with a finely serrated margin. The flowers are catkins, with the male catkins 5–10 cm long, the female catkins 1–2 cm long when mature in late autumn.

Distribution and habitat

Alnus rhombifolia is found in the western United States and Canada. It grows in a variety of habitats, including riparian zones, moist woods, and along streams and rivers. It is often found in association with other species of alder, as well as willows, cottonwoods, and sycamores.

Ecology

The Alnus rhombifolia plays a significant role in its ecosystem. It helps to stabilize streambanks and provide shade that cools the water, making it more suitable for fish and other aquatic organisms. Its roots also fix nitrogen, improving soil fertility.

Uses

The wood of the Alnus rhombifolia is used for fuel and to make charcoal. The bark has been used in traditional medicine by Native American tribes to treat various ailments.

Conservation

While not currently listed as threatened or endangered, the Alnus rhombifolia is susceptible to a number of threats, including habitat loss due to development and climate change.

See also

• List of Alder species
• Flora of North America

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  Alnus rhombifolia NPS