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Kalmia microphylla (Hook.) A. Heller
Synonym(s): Kalmia microphylla ssp. occidentalis, Kalmia microphylla var. occidentalis, Kalmia occidentalis, Kalmia polifolia ssp. microphylla, Kalmia polifolia ssp. occidentalis, Kalmia polifolia var. microphylla
USDA Symbol: KAMI
A low matted plant with several deep pink, bowl-shaped flowers facing upward on slender stalks growing near tops of leafy stems.
This species is sometimes called K. polifolia ssp. microphylla. Its close relative, the lower-elevation Bog Laurel (K. polifolia), is usually 8-20 inches (20-50 cm) high and has leaves 3/4-1 1/2 inches (2-4 cm) long with edges tightly rolled under. The smaller Western Swamp Laurel (K. occidentalis), found from the lowlands of Alaska south to Oregon, has flowers 1/2-3/4 of an inch (1.5-2 cm) wide.
Plant CharacteristicsDuration: Perennial Habit: Subshrub Leaf:
Dark Green Flower:
Bloom InformationBloom Color: Purple
Bloom Time: Apr , May
, WY Canada: AB
, ON Native Distribution:
Alaska south to southern California and central Colorado. Native Habitat:
Bogs and wet mountain meadows.
Growing ConditionsWater Use: Medium
Light Requirement: Sun
Soil Moisture: Wet
CaCO3 Tolerance: Medium
BenefitWarning: POISONOUS PARTS: All parts. Highly Toxic, Maybe Be Fatal if Eaten! Symptoms include: salivation, watering of eyes and nose, slow pulse, nausea, vomiting, sweating, abdominal pain, headache, tingling of skin, lack of coordination, convulsions, paralysis. Toxic Principle: Andromedotoxin, a resinoid; arbutin, a glycoside. (Poisonous Plants of N.C.)
Conspicuous Flowers: yes
National Wetland Indicator Status
|Status:|| OBL || OBL || OBL |
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
Record Last Modified: 2014-01-29
Research By: TWC Staff