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Alnus incana

Family: betulaceae
Common name(s): Thinleaf alder, river alder, mountain alder
Hardiness ratings: USDA zone 2~4 - 6~7

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup

Links for Alnus incana

• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-7) (5 photos)
• Garden.org - Community-assembled plant profile (4 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (7 photos)
• Missouri Botanical Garden - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 2-6) (3 photos)

Alnus incana subsp. rugosa

Common name(s): speckled alder
Hardiness ratings: USDA zone 2~4 - 6~7

Links

• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-7) (5 photos)
• Garden.org - Community-assembled plant profile (2 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation.
• Missouri Botanical Garden - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 2-6) (2 photos)
• Virginia Tech Dendrology - Factsheet with botanical characteristics and photos of various features. (6 photos)

Alnus incana tenuifolia

Common name(s): Thinleaf alder, river alder, mountain alder
Hardiness ratings: USDA zone 4~5 - 7~9

Links

• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-7) (5 photos)
• Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 5) (8 photos)
• Garden.org - Community-assembled plant profile (1 photo)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation.
• Las Pilitas Nursery - Catalog page about this California native, with description and horticultural basics. (zone 5-9) (3 photos)
• Southwest Colorado Wildflowers - Photos and botanical information about the species/genus. (4 photos)
• Virginia Tech Dendrology - Factsheet with botanical characteristics and photos of various features. (6 photos)