Skip Navigation
Sign In
  • Home
  • Search
    • Search Collections
    • Map Search
  • Chicago Botanic Garden
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • Denver Botanic Gardens
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • Desert Botanical Garden
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • NY Botanical Garden
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • Marie Selby Botanical Gardens
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • Sitemap

Tiarella

Tiarella
Family: Saxifragaceae
Tiarella image
Paul Rothrock
  • FNA
  • Gleason & Cronquist
  • Resources
Suneeti Jog in Flora of North America (vol. 8)
Herbs (often evergreen), rhizomatous, sometimes stoloniferous; caudex creeping, scaly. Flowering stems erect, usually leafless, rarely with 1-2 leafy bracts, 10-70 cm, short to long glandular-stipitate. Leaves in basal rosette and, sometimes, cauline, simple or 3-foliolate; stipules present; petiole short to long stipitate-glandular (hairs usually denser distally, gland-tipped); blade cordate or broadly ovate, lobed, base cordate, margins crenate to dentate, apex acute, abaxial surface stipitate-glandular along veins, adaxial surface stipitate-glandular, sometimes appressed, hairs uniformly scattered; venation palmate. Inflorescences racemes (sometimes with paniculate branches at base) or panicles, terminal from axillary buds in rosette, 15-70-flowered, bracteate. Flowers radially symmetric or somewhat bilaterally symmetric; hypanthium barely adnate to ovary proximally, 0.2-0.9 mm free from ovary, white or pinkish, (campanulate); sepals 5, whitish or pinkish, (ovate to lanceolate, apex acute or obtuse, glandular-stipitate abaxially, glabrous adaxially); petals 5, white or pinkish to purplish; nectary disc absent or inconspicuous; stamens 10; filaments linear; ovary superior, 1-locular, carpels connate, unequal; placentation parietal; styles 2, (tapering); stigmas 2. Capsules 2-winged (beaked), unequally valvate, abaxial carpel 1.5-2 times longer than adaxial carpel, (papery, each wing 5-10-veined). Seeds black, shiny, ellipsoid or ovoid, (base truncate), puncticulate; (funicular appendage absent). x = 7.

Intergeneric hybrids between Tiarella cordifolia and species of Heuchera and Mitella have been documented. Tiarella is placed within the Heuchera group of the Saxifragaceae. Based on cpDNA and other cytological traits, this is one of the best-defined groups of the Saxifragaceae. Chloroplast DNA restriction site data for the Heuchera group suggest the group as being paraphyletic. Tiarella cordifolia is known from eastern North America and T. trifoliata is known from western North America. Tiarella polyphylla D. Don occurs in Asia in the Himalayas through western and central China to Japan and Taiwan. Tiarella is used as a diuretic as well as for suppression of urine production and in treating kidney stones.

Vascular plants of NE US and adjacent Canada
Fls perfect, 5-merous, regular or nearly so, barely perigynous; hypanthium small, campanulate; pet clawed, linear to elliptic; stamens 10; carpels 2, unequal, united below into a superior, unilocular ovary, distinct above; placentas parietal, near the base; rhizomatous herbs with broad, palmately veined, lobed basal lvs and an erect, usually lfless stem with a bracteate raceme or panicle of white fls. 1 Asia, 5 N. Amer.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Species within inventory project: Arizona Flora
Tiarella austrina
Media resource of Tiarella austrina
Map not
Available
Tiarella biternata
Media resource of Tiarella biternata
Map not
Available
Tiarella californica
Media resource of Tiarella californica
Map not
Available
Tiarella cordifolia
Media resource of Tiarella cordifolia
Map not
Available
Tiarella laciniata
Media
not available
Map not
Available
Tiarella macrophylla
Media resource of Tiarella macrophylla
Map not
Available
Tiarella menziesii
Media
not available
Map not
Available
Tiarella nautila
Media resource of Tiarella nautila
Map not
Available
Tiarella polyphylla
Media resource of Tiarella polyphylla
Map not
Available
Tiarella stolonifera
Media resource of Tiarella stolonifera
Map not
Available
Tiarella trifoliata
Media resource of Tiarella trifoliata
Map not
Available
Tiarella unifoliata
Media resource of Tiarella unifoliata
Map not
Available
Tiarella wherryi
Media resource of Tiarella wherryi
Map not
Available
Institute for Museum and Library Services KU BI Logo Logo for the Biodiversity Knowledge Integration Center

This project was made possible in part by the Institute of Museum and Library Services [MG-70-19-0057-19].

EcoFlora is part of the SEINet Portal Network. Learn more here.

Powered by Symbiota.