Thinleaf Alder

Alnus incana (L.) Moench ssp. tenuifolia (Nutt.) Breitung - Birch family

Size

Mature Height: Up to around 35.0 feet

Plant Type: Tree, Shrub

Features

Flower Color: Purple

Bloom Time: Early Spring, Mid Spring

Conditions

Shade Tolerance: Intolerant

Native Range

  • USA:  Alaska, Arizona, California, Colorado, Connecticut, Idaho, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Montana, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Dakota, Ohio, Oregon, Pennsylvania, Rhode I., Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
  • CAN:  Alberta, British Columbia, Newfoundland, Manitoba, New Brunswick, Newfoundland, Northwest Territorie, Nova Scotia, Nunavut, Ontario, Prince Edward I., Québec, Saskatchewan, Yukon
Regional Native Status: L48 (N), AK (N), CAN (N)

State-level native status is based on data available through Plants of the World Online. Regional Native Status comes from the USDA Plants Database. For more detailed native status information, please refer to BONAP.