Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Alpine Bog Laurel
Kalmia microphylla (Hook.) A. Heller
- Family: Heath (Ericaceae)
- Flowering: June-August
- Field Marks: The distinguishing features of this low shrub are its oblong or oval, opposite, evergreen leaves that are less than twice as long as broad.
- Habitat: Moist ground.
- Habit: Low-growing, spreading shrub.
- Stems: Much branched, up to 8 inches long, smooth or hairy.
- Leaves: Opposite, simple, evergreen, oblong or oval, rounded or barely pointed at the tip, tapering to the nearly sessile base, dark green above, paler beneath, up to 1 inch long, more than 1/2 inch wide, smooth or slightly hairy, without teeth,
- Flowers: Few in terminal clusters, up to 3/4 inch across, on smooth, slender stalks up to 2 inches long.
- Sepals: 5, green, united below, 1/4-1/3 inch long, smooth, the lobes oblong to ovate.
- Petals: 5, united to form a saucer, rose-purple, up to 3/4 inch across.
- Stamens: 10, not exserted beyond the petals.
- Pistils: Ovary superior, smooth; style slender.
- Fruits: Capsules spherical, up to 1/3 inch in diameter, smooth, subtended by the persistent stipules.
- Notes: Kalmia polifolia is sometimes considered the same as this species.
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