Definition

1. Noun:
   • A common name for two distinct species of small trees or shrubs in North America. The name refers to their typical habitat in mountainous or upland regions.

Usage

• The term "mountain alder" is used to identify a plant by its common name. It is important to note that this name can refer to different species depending on the geographic location. Botanical or scientific names are used for precise identification.

Examples

• Noun:
  • The mountain alder along the stream bank was turning a brilliant color.
  • We identified a grove of mountain alder during our hike in the Rockies.

Advanced Usage

• In botanical and ecological contexts, the ambiguity of the common name "mountain alder" necessitates the use of scientific names: subsp. (a tree of the western US) or (a shrubby maple of eastern North America).

Variants and Related Words

• Sitka alder: Another common name for subsp. , a shrub alder found in mountainous and northern regions.
• Thinleaf alder: A common name for subsp. , one of the species called "mountain alder".
• Mountain maple: A direct synonym for the eastern species , which is also called "mountain alder".

Different Meanings

1. Tree of western United States: This refers specifically to subsp. , a deciduous tree in the birch family (Betulaceae) commonly found along streams in mountainous areas.
2. Small shrubby maple of eastern North America; scarlet in autumn: This refers specifically to , a deciduous shrub or small tree in the soapberry family (Sapindaceae) known for its vibrant red fall foliage.

Synonyms

• For the western tree: Thinleaf alder, gray alder.
• For the eastern shrub: Mountain maple, moose maple, dwarf maple.

Noun

1. tree of western United States
2. small shrubby maple of eastern North America; scarlet in autumn