Northern Prairie Wildlife Research Center
Hazel Alder (Alnus serrulata)
- Family: Birch (Betulaceae)
- Flowering: March-April.
- Field Marks: This alder has woody "cones" up to 1 inch long and wingless seeds.
- Habitat: Along streams, wet meadows.
- Habit: Shrub with several stems.
- Stems: Dark gray to black, up to 15 feet tall; the twigs usually rusty-hairy early in the season.
- Leaves: Alternate, simple, ovate to obovate, pointed or rounded at the tip, rounded or nearly heart-shaped at the base, sharply toothed, hairy on the veins on the lower surface of the leaves.
- Flowers: Male and female flowers borne separately but on the same plant, appearing before the leaves unfold; the male in slender, drooping spikes up to 3 inches long; the female in erect, oblong "cones" less than 1 inch long.
- Sepals: 4, minute, present only in the male flowers.
- Petals: 0.
- Stamens: 4.
- Pistils: Styles 2.
- Fruits: Woody, cone-like, up to 1 inch long, containing several nut-like seeds; the seeds shiny, obovoid, up to 1/8 inch long, wingless.
Return to Species List -- Group 5
Next Species -- Dull-leaf Indigo (Amorpha fruticosa)