Alnus sinuata, commonly known as the Sitka Alder or Thinleaf Alder, is a deciduous shrub or small tree that belongs to the Betulaceae family. It is native to the western regions of North America, from Alaska to California.
Sitka Alder can grow up to 30 feet in height, with a trunk diameter of 8 inches. The leaves are thin, serrated, and alternate, with a length of 2 to 4 inches. The tree produces male and female flowers in separate clusters, with the male flowers being yellowish-brown and the female flowers being green.
The Sitka Alder is commonly found in riparian zones, wetlands, and along streams and rivers. It prefers moist soil and can tolerate flooding, making it an important species in stabilizing streambanks and preventing erosion. It is also an important habitat for wildlife, providing cover and food for a variety of bird and mammal species.
The bark and wood of the Sitka Alder are used for fuel and charcoal production, as well as for making furniture, baskets, and other handicrafts. The tree is also used in land reclamation and erosion control projects.