Tiarella cordifolia

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Ordo: Saxifragales

Familia: Saxifragaceae
Genus: Tiarella
Species: Tiarella cordifolia
Name

Tiarella cordifolia L. (1753)
Synonyms

Homotypic
Tiarella cordifolia subsp. typica (Lakela) Wherry, Notul. Nat. Acad. Nat. Sci. Philadelphia 42: 4 (3-4). 1940, nom. inadmiss.
Tiarella cordifolia var. typica Lakela, Amer. J. Bot. 24: 347. 1937, nom. inadmiss.
Tiarella cordifolia var. bracteata Farwell, Rep. (Annual) Michigan Acad. Sci. 19: 248. 1917, nom. illeg.

Heterotypic
Tiarella cordifolia f. parviflora Fernald, Rhodora 19: 132. 1917 [1].
Tiarella cordifolia f. subaequalis Lakela, Amer. J. Bot. 24: 348. 1937.
Tiarella cordifolia f. tridentata Lakela, Amer. J. Bot. 24: 348. 1937.
Tiarella cordifolia subsp. austrina (Lakela) Wherry, Notul. Nat. Acad. Nat. Sci. Philadelphia 42: 4 (3-4). 1940.
Tiarella cordifolia subsp. collina (Wherry) Wherry, Notul. Nat. Acad. Nat. Sci. Philadelphia 42: 4 (3-4). 1940.
Tiarella cordifolia var. austrina Lakela, Amer. J. Bot. 24: 348. 1937.
Tiarella cordifolia var. collina Wherry, Notul. Nat. Acad. Nat. Sci. Philadelphia 42: 3 (3-4). 1940.
Tiarella macrophylla Small, Fl. S.E. U.S. 502, 1331. 1903.
Tiarella wherryi Lakela, Amer. J. Bot. 24: 349, fig. 1937.

References

Lakela, O. 1937. A monograph of the genus Tiarella L. in North America. Amer. J. Bot. 24: 344–351 [2].
Linnaeus, C. 1753. Species Plantarum 1: 405.
USDA, ARS, Germplasm Resources Information Network. Tiarella cordifolia in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 07-Oct-06.
Wherry 1940. A novelty in the genus Tiarella (Saxifragaceae). Notulae Naturae 42, 1-4 [3].

Vernacular names
English: Heartleaved foamflower
suomi: Rönsytiarella
Nederlands: Koudkruid, schuimbloem

Tiarella cordifolia, the heartleaf foamflower,[1] heartleaved foamflower, Allegheny foamflower, false miterwort, or coolwort, is a species of flowering plant in the saxifrage family, native to North America. It is a herbaceous perennial which is valued in cultivation for its erect stems of foamy cream flowers in summer.

Description

Tiarella cordifolia has a scaly horizontal rhizome and seasonal runners?. The leaves are 5–10 cm (2–4 in) long, basal, long stalked, hairy, with 3-7 shallow lobes, and heart-shaped at the base. They are dark green usually mottled with brown, rough-hairy above and downy beneath. They have long flowering stems that can grow as tall as 30 cm (12 in). The flowers are white, small and feathery and form a long terminal cluster on a leafless stalk. The inflorescences are 15–30 cm (6–12 in) tall, with the flowers borne in close, erect racemes. The flowers have 5 petals (entire) and 10 stamens (long and slender), giving the flower cluster a fuzzy appearance. The two unequal seed capsules split along their inside seams, releasing several pitted seeds.[2]

This tiarella spreads well by rhizomes, unlike other cultivated tiarellas, but lacks the invasive tendencies of many more commonly employed groundcovers. Its habitats include deciduous woods and stream banks.

The flowers are visited by small bees, syrphus flies, and butterflies that may affect pollination.

This plant has gained the Royal Horticultural Society's Award of Garden Merit.[3][4]
Inflorescence
Origin of name

The Latin specific epithet cordifolia means “heart-shaped leaves”.[5] In fact, "tiarella", in French, can be translated "crown" (tiare). The little fruit produces by the plant looks like a "tiare" - a crown.
Cultivars

Tiarella cordifolia 'FM Mooberry' is named after F. M. Mooberry of the Brandywine Conservancy.[6]

References

USDA, NRCS (n.d.). "Tiarella cordifolia". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 10 December 2015.
"Lady Bird Johnson Wildflower Center - The University of Texas at Austin". www.wildflower.org. Retrieved 2022-02-13.
"RHS Plant Selector Tiarella cordifolia AGM / RHS Gardening". Apps.rhs.org.uk. Retrieved 2012-10-16.
"AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 102. Retrieved 23 December 2018.
Harrison, Lorraine (2012). RHS Latin for Gardeners. United Kingdom: Mitchell Beazley. ISBN 978-1845337315.
"Blog | Pennsylvania Horticultural Society".