1) Genus tiarella 2) Rosid dicot genus 
Tiarella, foamflower is a genus of wildflower and garden plants found in Asia and North America. They belong to the Saxifrage family (Saxifragaceae). Some species are: Many hybrids are known and cultivated. Image:Foamflower.jpg Image:Foamflower Tiarella `Cygnet` Leaves 2054px.jpg|Tiarella `Cygnet` leaves ...
[n] - small genus of North American herbs having mostly basal leaves and slender racemes of delicate white flowers
genus Tiarella noun small genus of North American herbs having mostly basal leaves and slender racemes of delicate white flowers