Tiarella trifoliata

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Tiarella trifoliata
Tiarella trifoliata 1461.JPG
Tiarella trifoliata var. trifoliata
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Saxifragales
Family: Saxifragaceae
Genus: Tiarella
T. trifoliata
Binomial name
Tiarella trifoliata
  • T. t. var. laciniata
  • T. t. var. trifoliata
  • T. t. var. unifoliata

Tiarella trifoliata, commonly called threeleaf foamflower, [1] laceflower, [2] or sugar-scoop, [2] is a dicot in the family Saxifragaceae .


It is native to the low to moderate elevation moist forests of western North America, from northern California to Montana and western Canada.


Tiarella trifoliata is a perennial herb that grows in the late spring.

The flowers are bell-shaped, white, solitary from an elongate, leafless panicle. The calyx lobes are 1.5–2.5 mm and petals are 3–4 mm. Basal leaves are 15–80 mm long and up to 120 mm wide, trifoliate or palmately 3- to 5-lobed. Cauline leaves are infrequent and much smaller. [1]


There are three varieties of T. trifoliata:

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  1. 1 2 "Tiarella trifoliata". WTU Herbarium Image Collection. Burke Museum, University of Washington. Retrieved 2013-04-18.
  2. 1 2 "Tiarella trifoliata". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 January 2018.
  3. Pojar, Jim; MacKinnon, Andy. Plants of the Pacific Northwest Coast. Lone Pine Publishing, 1994, p. 168, ISBN   978-1-55105-040-9