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Foamflower Tiarella 'Cygnet' Flower Closeup 2000px.JPG
Tiarella 'Cygnet'
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Saxifragales
Family: Saxifragaceae
Genus: Tiarella

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Tiarella, or foamflower, [1] 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. The following have been given the Royal Horticultural Society's Award of Garden Merit:

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<i>Tiarella cordifolia</i>

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<i>Silene coronaria</i>

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<i>Kalmia angustifolia</i>

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<i>Gillenia trifoliata</i>

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<i>Maurandya barclayana</i>

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<i>Nuttallanthus canadensis</i>

Nuttallanthus canadensis, the blue toadflax, Canada toadflax, or old-field toadflax, is a species of Nuttallanthus in the family Plantaginaceae, native to eastern North America from Ontario east to Nova Scotia and south to Texas and Florida.

<i>Veronicastrum virginicum</i>

Veronicastrum virginicum, or Culver's root, is a species of flowering plant in the plantain family, native to the eastern United States and south-eastern Canada. Growing to 200 cm (79 in) tall by 45 cm (18 in) broad, it is an erect herbaceous perennial with slender racemes of white or occasionally pink or purple flowers in summer.

<i>Aurinia saxatilis</i>

Aurinia saxatilis is an ornamental plant native to Asia and Europe.

<i>Achillea filipendulina</i>

Achillea filipendulina, the yarrow, fernleaf yarrow, milfoil, or nosebleed, is an Asian species of flowering plant in the sunflower family, native to central and southwestern Asia. It is also naturalized in parts of Europe and North America.

<i>Phlox subulata</i>

Phlox subulata is a species of flowering plant in the family Polemoniaceae, native to eastern and central USA, and widely cultivated. Growing to about 13 cm (5 in) high at most and covering a 50 cm (20 in) wide area, it is an evergreen perennial forming mats or cushions of hairy, linear leaves. The small, five-petaled flowers bloom in rose, mauve, blue, white, or pink in late spring to early summer.

<i>Tiarella trifoliata</i>

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


  1. "Tiarella". Natural Resources Conservation Service PLANTS Database. USDA . Retrieved 10 December 2015.
  2. "TiarellaAngel Wings = 'Gowing'". RHS. Retrieved 5 March 2021.
  3. "Tiarella 'Spring Symphony". RHS. Retrieved 5 March 2021.
  4. "Tiarella cordifolia". RHS. Retrieved 5 March 2021.
  5. "Tiarella wherryi". RHS. Retrieved 5 March 2021.