Tiarella stoloniferaG.L.Nesom

WFO wfo-1000029278 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Tiarella stolonifera, photographed by Tom Scavo
fig. a Tom Scavo, CC BY 4.0 / 2022-06-10 / obs. 205897214
Tiarella stolonifera, photographed by Bernie Paquette
fig. b Bernie Paquette, CC BY 4.0 / obs. 204332412
Tiarella stolonifera, photographed by Lynn Harper
fig. c Lynn Harper, CC0 1.0 / obs. 203973016
Tiarella stolonifera, photographed by Lynn Harper
fig. d Lynn Harper, CC0 1.0 / obs. 203510959
Tiarella stolonifera, photographed by Steven Lamonde
fig. e Steven Lamonde, CC BY 4.0 / obs. 205766364
Tiarella stolonifera, photographed by Lynn Harper
fig. f Lynn Harper, CC0 1.0 / obs. 202794855
Tiarella stolonifera, photographed by Trix Niernberger
fig. g Trix Niernberger, CC0 1.0 / obs. 202838339
Tiarella stolonifera, photographed by Lynn Harper
fig. h Lynn Harper, CC0 1.0 / obs. 202799625

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 22 botanical countries

Regions where Tiarella stolonifera is native: Connecticut, Kentucky, Maine, Maryland, Massachusetts, Michigan, New Brunswick, New Hampshire, New Jersey, New York, North Carolina, Nova Scotia, Ohio, Ontario, Pennsylvania, Québec, Rhode I., Tennessee, Vermont, Virginia, West Virginia, Wisconsin ConnecticutKentuckyMaineMarylandMassachusettsMichiganNew BrunswickNew HampshireNew JerseyNew YorkNorth CarolinaNova ScotiaOhioOntarioPennsylvaniaQuébecTennesseeVermontVirginiaWest VirginiaWisconsin Rhode I.
Native distribution of Tiarella stolonifera, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Connecticut CNT NORTHERN AMERICA
Kentucky KTY
Maine MAI
Maryland MRY
Massachusetts MAS
Michigan MIC
New Brunswick NBR
New Hampshire NWH
New Jersey NWJ
New York NWY
North Carolina NCA
Nova Scotia NSC
Ohio OHI
Ontario ONT
Pennsylvania PEN
Québec QUE
Rhode I. RHO
Tennessee TEN
Vermont VER
Virginia VRG
West Virginia WVA
Wisconsin WIS

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 2,560 in flower of 4,251 examined

Peak flowering in May. Each bar is the share of Tiarella stolonifera observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 2,560 of 4,251 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

When it blooms, where you are 8 states

StatePeaksObservations in flower
Maine May 51
Massachusetts May 145
Michigan May 52
New Hampshire May 119
New York May 233
Ohio May 150
Pennsylvania May 248
Vermont May 865

Where it actually grows measured, from 1,914 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -15.2 °C -11.0 °C -4.5 °C
Warmest month, mean daily high 22.6 °C 25.4 °C 28.7 °C
Annual rainfall 927 mm 1,169 mm 1,546 mm
Rainfall in the driest quarter 177 mm 234 mm 321 mm

It is found where winters are severely cold. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 1,914 research-grade observations of Tiarella stolonifera that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 2 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Tiarella cordifolia f. allanthera Vict. & J.Rousseau
  • Tiarella cordifolia var. bracteata Farw.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.