Alnus incana ssp. tenuifolia

General:
Deciduous shrub or tree, up to 12 m tall, usually 2-5 m tall, new growth short-hairy; axillary buds with short stalks; bark scaly, often lichen-covered, yellowish-brown or grey.

Leaves:
Alternate, deciduous, smooth, coarsely to irregularly toothed, the teeth pointing outwards, leaf margins not rolled under, brownish in the fall.

Flowers:
Inflorescence of male and female catkins, which open before the leaves on previous year's growth; male catkins with stalks.

Fruits:
Small nutlets, without wings; female cones 1-1.5 cm long, egg-shaped.

Source:  The Illustrated Flora of British Columbia

Blooming Period:
Spring

Fruit/Seed characteristics:
Colour: Brown
Present from Spring to Summer

Source:  The USDA

Synonyms and Alternate Names:
Alnus tenuifolia Nutt.