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Tiarella trifoliata L.
Threeleaf foamflower, Western Foamflower
USDA Symbol: TITR
Tiny white flowers hanging in loose clusters in narrow branched racemes atop leafy stems. Flowers: Calyx about 1/4 (6 mm) wide, with 5 lobes attached to a pale green, cup-like base about 1/16 (2 mm) long, upper lobe largest; petals 5.
There are two forms of this flower. If the leaves are cut to the top of the leafstalk, this is the variety trifoliata; if the leaves are lobed but not cut, then this is the variety unifoliata.
Plant CharacteristicsDuration: Perennial Habit: Herb Flower:
Bloom InformationBloom Time: May , Jun , Jul , Aug
, WA Canada: BC Native Distribution:
Alaska south to central California and east to Idaho and western Montana. Native Habitat:
Moist woods, along stream banks.
National Wetland Indicator Status
|Status:|| FAC || FAC || FAC |
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: 2013-10-12
Research By: TWC Staff