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Loughmiller, Campbell and Lynn
Spiraea douglasii Hook.
Hardhack spiraea, Rose spirea, Western spiraea
USDA Symbol: spdo
A many-stemmed, fast-growing, 4-10 ft. shrub. Oblong leaves are shiny green on top and white-woolly beneath. Tiny, rose-colored, five-petaled flowers occur in dense, 4-6 in. long panicles at the tips of the stems. The panicles appear fuzzy because of the flowers prominent, protruding stamens.
Hardhack is a member of the family Rosaceae, which includes about 2000 species of trees, shrubs, and herbs worldwide, including serviceberries (Amelanchier), hawthorns (Crataegus), apples (Malus), plums and cherries (Prunus), and mountain-ashes (Sorbus).
Plant CharacteristicsDuration: Perennial Habit: Shrub Leaf:
Dark Green Fruit: Size Class:
Bloom InformationBloom Color: Pink
Bloom Time: Jun , Jul , Aug , Sep
, WA Native Distribution:
B.C. to n.w. MT,
s. to n. CA Native Habitat:
Low, damp places below 6000 ft.
Growing ConditionsWater Use: Low
Light Requirement: Part Shade
Soil Moisture: Moist
CaCO3 Tolerance: Low
Soil Description: Moist soils.
Conditions Comments: Not Available
BenefitWarning: Sometimes used medicinally, this plant can be poisonous in high quantities. Sensitivity to a toxin varies with a personís age, weight, physical condition, and individual susceptibility. Children are most vulnerable because of their curiosity and small size. Toxicity can vary in a plant according to season, the plantís different parts, and its stage of growth; and plants can absorb toxic substances, such as herbicides, pesticides, and pollutants from the water, air, and soil.
Conspicuous Flowers: yes
PropagationDescription: Propagate by seed or softwood cuttings. Offshoots from the creeping underground stems can be readily established.
Seed Collection: Not Available
Commercially Avail: yes
National Wetland Indicator Status
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.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Santa Barbara Botanic Garden
- Santa Barbara, CANative Seed Network
- Corvallis, OR
Record Last Modified: 2007-01-01
Research By: TWC Staff