Contents
Description
Alnus Rubra, commonly known as Red Alder, is a deciduous tree that is native to the western part of North America. It is a fast-growing tree that can reach up to 100 feet in height and 3 feet in diameter. The bark is smooth and grayish-brown when young, but it becomes rough and dark when mature. The leaves are simple, alternate, and elliptical in shape, with a toothed margin. The flowers are inconspicuous and appear in early spring. The fruit is a cone-like structure that contains small seeds.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Fagales |
| Family | Betulaceae |
| Genus | Alnus |
Appearance
Red Alder has a conical-shaped crown with a straight trunk. The bark is smooth and grayish-brown when young, but it becomes rough and dark when mature. The leaves are simple, alternate, and elliptical in shape, with a toothed margin. The leaves are bright green in color and turn yellow in the fall. The flowers are inconspicuous and appear in early spring. The fruit is a cone-like structure that contains small seeds. The tree is fast-growing and can reach up to 100 feet in height and 3 feet in diameter.
Care Guide
Red Alder prefers moist and well-drained soil. It can tolerate a wide range of soil types, including clay, loam, and sand. The tree requires regular watering, especially during the first few years of growth. Fertilization is not necessary, but it can improve the growth rate and health of the tree. The tree prefers full sun to partial shade and can tolerate a wide range of temperatures. It is hardy in USDA zones 7-9.
Common Pests & Diseases
Red Alder is susceptible to a few pests and diseases. Some common pests include aphids, mites, and caterpillars. These pests can cause damage to the leaves and twigs of the tree. Some common diseases include canker, root rot, and leaf spot. These diseases can cause the tree to decline and die if left untreated.
Habitat
Red Alder is native to the western part of North America, including Alaska, British Columbia, Washington, Oregon, and California. It prefers moist and well-drained soil and can be found in riparian areas, wetlands, and forests. The tree is an important species for wildlife, providing food and habitat for a variety of animals, including deer, elk, and bears.
Question and Answer
Q: Is Red Alder a good tree for landscaping?
A: Yes, Red Alder is a good tree for landscaping. It is fast-growing and can provide shade and aesthetic value to a landscape.
Q: Can Red Alder tolerate drought?
A: No, Red Alder prefers moist soil and cannot tolerate drought. It requires regular watering, especially during the first few years of growth.
Q: What are some common uses of Red Alder?
A: Red Alder is commonly used for lumber, furniture, and paper production. It is also used for ecological restoration and as a food source for wildlife.
Q: How tall can Red Alder grow?
A: Red Alder can grow up to 100 feet in height and 3 feet in diameter.
Related Plants
- Alnus glutinosa (European Alder)
- Alnus incana (Grey Alder)
- Alnus rhombifolia (White Alder)
References
- Dirr, M. A. (2011). Dirr’s encyclopedia of trees and shrubs. Timber Press.
- Peattie, D. C. (1950). A natural history of western trees. Houghton Mifflin.
- USDA Plants Database. (n.d.). Alnus rubra. Retrieved from https://plants.usda.gov/home/plantProfile?symbol=ALRU
