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Floating Marsh Pennywort
Hydrocotyle ranunculoides
About Floating Marsh Pennywort (Hydrocotyle ranunculoides) 1 Nurseries Carry This Plant Hydrocotyle ranunculoides, known commonly as water pennywort or floating pennywort is an aquatic plant in the Apiaceae. It is native to North and South America and parts of Africa. In the UK it is an invasive alien species which is currently spreading in waterways in England and Wales. It is also a weed in Australia. On the other hand, it is a threatened species in parts of its native range in the United States.
Plant Description
Plant Type
Plant Type
Perennial herb

Landscaping Information
Full Sun


Common uses
Common uses
Bogs and Ponds

For propagating by seed: No treatment. ( Emery and Frey 1971).

Sunset Zones
Sunset Zones?
4*, 5*, 6*, 7*, 8, 9, 10, 14*, 15*, 16*, 17*, 18*, 19*, 20*, 21*, 22*, 23*, 24*

Natural Setting
Site Type
Site Type
Edges of lakes and ponds

Annual Precipitation: 5.8" - 51.3", Summer Precipitation: 0.19" - 2.95", Coldest Month: 39.7" - 55.2", Hottest Month: 57.7" - 83.7", Humidity: 0.30" - 35.53", Elevation: -7" - 5681"

Alternative Names
Common Names: Floating Marsh-pennywort, Floating Marshpennywort, Floating Pennywort, Water Pennywort

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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