Flora of North America species comparison

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Tiarella cordifolia

foam-flower, heart-leaf foamflower, tiarelle cordifoliée
Flowering stems

15–40 cm

Tiarella cordifolia
Phenology Flowering Mar–Jul; fruiting Apr–Sep.
Habitat Open and shady, dry to swampy deciduous woods, along streams
Elevation 40-800 m (100-2600 ft)
Distribution
from FNA
AL; CT; GA; KY; MA; MD; ME; MI; MN; MS; NC; NH; NJ; NY; OH; PA; RI; SC; TN; VA; VT; WI; WV; NB; NS; ON; QC
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Discussion

Tiarella macrophylla was described from Tyron Mountain, North Carolina; the specimen consists of basal leaves of Heuchera villosa and racemes of T. cordifolia. Tiarella wherryi and T. cordifolia have been differentiated primarily on the basis of lack of stolons in T. wherryi. Such plants grow in mixed populations and it has been impossible to differentiate taxa on the basis of herbarium specimens. It is also thought that the differences between the taxa might be a result of altitudinal variation in habitat. Attempts by Lakela to distinguish var. cordifolia and var. austrina on the basis of leaf dimensions and marginal dentation have been thwarted by continuous variation in these characteristics.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 115.
Parent taxa Saxifragaceae > Tiarella
Sibling taxa
T. trifoliata
Synonyms T. cordifolia var. austrina, T. cordifolia var. bracteata, T. cordifolia subsp. collina, T. macrophylla, T. wherryi
Name authority Linnaeus: Sp. Pl. 1: 405. 1753 ,
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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