Coolwort, Cut-leaved Foamflower, Foamflower, Foam Flower: Tiarella trifoliata var. laciniata (Synonyms: Tiarella californica, Tiarella laciniata) - Basal and stem leaves have 3 leaflets. Each leaflet is cleft more than 1/2 the way into the middle. Flowers white, tiny, in a loose panicle.
Coolwort, Three-leaf Foamflower, Trefoil Foamflower, Trefoil False Mitrewort: Tiarella trifoliata var. trifoliata - Basal and stem leaves have 3 leaflets. Each leaflet is cleft less than 1/2 the way into the middle. Flowers white, tiny, in a loose panicle.
Coolwort, Oneleaf Foamflower, Simple-leaved Foamflower: Tiarella trifoliata var. unifoliata (Synonyms: Tiarella trifoliata ssp. unifoliata, Tiarella unifoliata) - Basal and stem leaves simple, maple-leaf shaped with several lobes. Flowers white, tiny, in a loose panicle.