Yellow Floating Heart - Nymphoides peltata
State Rank Reason (see State Rank above)
Nymphoides peltata is an aquatic plant native to Eurasia and introduced into North America. It has not been documented in Montana. A conservation status rank is not applicable (SNA) because the plant is not a suitable target for conservation activities. The purpose of this profile is to provide awareness and education to prevent its introduction into Montana.
Nymphoides peltata is cultivated for aquatic gardens, but when released into the natural environment it can become an aggressive weed. Please do not plant exotic aquatic plants into water bodies because the consequences for escape and invasion are far too great. Preventing deliberate plantings and spread from plant fragments are the best means to keep this plant out of Montana’s waters.
PLANTS: Perennial, aquatic plants with submersed stems and floating leaves. Source: Gilbin et al. [eds.] 2018.
LEAVES: Floating leaves are roundish to narrowly elliptic, 2-15 cm across, and with smooth to shallow broadly toothed margins. There are no submersed leaves. Source: Gilbin et al. [eds.] 2018.
INFLORESCENCE: Yellow flowers occur in an umbel with erect stems (peduncles). Flowers occur above the water surface (are emergent). Umbels consist of 4-20 flowers and grow from between two sub-oppositely arranged leaves. Source: Gilbin et al. [eds.] 2018.
Yellow Floating Heart is introduced into portions of eastern Canada (NRCS – PLANTS Database accessed on June 24, 2019) and southern British Columbia (Gilbin et al. [eds.] 2018). Yellow Floating Heart is introduced in several U.S. states in the New England, mid-west and south-central regions, plus Arizona, California, and Washington (NRCS – PLANTS Database accessed on June 24, 2019). In Washington it occasionally escapes cultivation and has been found in southwestern and eastern Washington (Gilbin et al. [eds.] 2018).
For maps and other distributional information on non-native species see:
Nonindigenous Aquatic Species Database from the U.S. Geological Survey
Invasive Species Habitat Tool (INHABIT) from the U.S. Geological Survey
Invasive Species Compendium from the Centre for Agriculture and Bioscience International (CABI)
EDDMapS Species Information EDDMapS Species Information
Yellow Floating Heart is cultivated for aquatic gardens (Jepson Flora Project [eds.] 2019).
In Washington it is found along pond and lake margins.
FLOWER and FRUIT
Sepals are 10-13 mm long. 5-6 yellow petals are circular in outline, 2-5 cm wide, and with winged to somewhat laciniate (fringed unequally) margins. 5 Stamens alternate with the petals and have anthers about 3 mm long. Pistil is superior, has a 2-carpel ovary and styles 1-5 mm long.
Fruit is a capsule of 12-25 mm tall.
- Literature Cited AboveLegend: View Online Publication
- Hitchcock, C.L. and A. Cronquist. 2018. Flora of the Pacific Northwest: An Illustrated Manual. Second Edition. Giblin, D.E., B.S. Legler, P.F. Zika, and R.G. Olmstead (eds). Seattle, WA: University of Washington Press in Association with Burke Museum of Natural History and Culture. 882 p.
- Jepson Flora Project (Editors). 2011-2019. The Jepson eFlora for California. The Jepson Herbarium, University of California, Berkeley, California.
- U.S. Department of Natural Resources and Conservation (NRCS) - PLANTS database. 2006-2019. The Plants Database. USDA Natural Resources Conservation Service (USDA, NRCS). National Plant Data Center, Baton Rouge, Louisiana 70874-4490 USA.