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Water Smartweed
Persicaria punctata
About Water Smartweed (Persicaria punctata) 2 Nurseries Carry This Plant Water Smartweed (Polygonum punctatum) is a common native perennial herb that grows in northern, southern and central California. It is moderately fast growing and short-lived. It grows in an upright form to a height of 3.2 feet, with active growth during the summer. Flowers are white and striking, and bloom in the summer. Leaves are medium green and deciduous. It tends to grow in shallow water and shores, at elevations from 0-4900 feet.
Plant Description
Plant Type
Plant Type
Perennial herb

0.49 - 3.3 ft tall

Winter Deciduous

Flower Color
Flower Color

Wildlife Supported

Butterflies & moths hosted ( 1 confirmed , 29 likely * ) SHOW ALL

Landscaping Information
Full Sun


Common uses
Common uses
Bogs and Ponds

For propagating by seed: 1 mo. stratification (Crocker and Barton 1957).

Natural Setting
Site Type
Site Type
Shallow water, shores

Annual Precipitation: 2.8" - 68.2", Summer Precipitation: 0.15" - 2.03", Coldest Month: 32.7" - 58.4", Hottest Month: 57.1" - 88.0", Humidity: 0.01" - 38.77", Elevation: -253" - 6797"

Alternative Names
Botanical Names: Polygonum punctatum
Common Names: Dotted Smartweed

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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