| Family | RANUNCULACEAE |
| Genus species | Coptis trifolia (L.) Salisb. |
| Bibliography | Trans. Linn. Soc. London 8: 305 (1807) |
| Native Range | e. Siberia to Russian Far East, Japan, Subarctic America to nc. & ne. USA |
| Primary Biome | Temperate |
| Habitat | thickets and woods |
| Altitude | 0-2100m |
| Description | leaves 3-5cm long, with three sessile, obovate, dentate or lobate leaflets, flowers solitary, 1-2cm across, petals 3-5mm long, clavate |
| Size | 3-17cm |
| Color | white |
| Bloom | late spring, summer |
| Ca | |
| Type | perennial |
| Cultivation | cold, shady site with a humous, moist soil alpine house, moist, humous soil, shade |
| Propagation | fresh seed, germ. 3-12 months, 13-16°C division in early spring |
| Synonyms | Anemone groenlandica Oeder Chryza borealis Raf. Coptis daisetsuensis Miyabe & Tatew. Coptis groenlandica (Oeder) Fernald Coptis trifolia f. plena K.Imai Coptis trifolia f. semiplena (Miyabe & Tatew.) Okuyama Coptis trifolia var. semiplena Miyabe & Tatew. Coptis trifolia ssp. groenlandica (Oeder) Hultén Coptis trifolia var. groenlandica (Oeder) Fassett Helleborus pumilus Salisb. Helleborus trifoliatus Houtt. Helleborus trilobus Lam. Helleborus trifolius L. Isopyrum trifolium (L.) Britton |
| Territory | 3 Asia-Temperate 30 Siberia (YAK Yakutskiya) 31 Russian Far East (KAM Kamchatka, KHA Khabarovsk, KUR Kuril Is., MAG Magadan, PRM Primorye, SAK Sakhalin) 38 Eastern Asia (JAP Japan) 7 Northern America 70 Subarctic America (ALU Aleutian Is., ASK Alaska, GNL Greenland, NUN Nunavut, NWT Northwest Territories) 71 Western Canada (ABT Alberta, BRC British Columbia, MAN Manitoba, SAS Saskatchewan) 72 Eastern Canada (LAB Labrador, NBR New Brunswick, NFL Newfoundland, NSC Nova Scotia, ONT Ontario, PEI Prince Edward I., QUE Québec) 74 North-Central U.S.A. (MIN Minnesota, WIS Wisconsin) 75 Northeastern U.S.A. (CNT Connecticut, INI Indiana, MAI Maine, MAS Masachusettes, MIC Michigan, NWH New Hampshire, NWJ New Jersey, NWY New York, OHI Ohio, PEN Pennsylvania, RHO Rhode I., VER Vermont, WVA West Virginia) 78 Southeastern U.S.A. (MRY Maryland, WDC District of Columbia) |