Utah Valley University Herbarium


Accession # 04481 
Family - UVUAPG III FamilyCronquist FamilyA Utah Flora
Species Polygonum persicaria L.
Common name   spotted ladysthumb
K.T. Harper   s.n.  
   with D. Carter, D.M. Barnes, R. Van Buren
Coll. Date 26 July 2000 
United States
San Juan County
Locality Elk Ridge Road (FR 088), Gooseberry Guard Station, Duck Lake;
     Elev.: 8739 ft. (2664 m.)
Habitat Notes pinyon, ponderosa pine, aspen; wet pond margin. 
Climate NCDC temperatures, daily high (red), daily average (green) and daily low (blue), from 1970 to 2000 at this location.   NCDC average monthly precipitation from 1970 to 2000 at this location.
Latitude Longitude 37° 48'  46" N, 109° 46'  22" W
Datum Not recorded
Uncertainty Polygon diameter (with coordinate as origin): 1' (1800 m.)


Synonyms recognized by ITIS (bold taxon is currently accepted):

     Polygonum persicaria L.

     Persicaria maculata (Raf.) S.F. Gray
     Persicaria persicaria (L.) Small
     Persicaria ruderalis (Salisb.) C.F. Reed
     Persicaria ruderalis var. vulgaris (Webb & Moq.) C.F. Reed
     Persicaria vulgaris Webb & Moq.
     Polygonum dubium Stein
     Polygonum fusiforme Greene
     Polygonum minus auct. non Huds.
     Polygonum minus var. subcontinuum (Meisn.) Fern.
     Polygonum persicaria var. angustifolium Beckh.
     Polygonum persicaria var. ruderale (Salisb.) Meisn.
     Polygonum puritanorum Fern.

Common Name(s): ladysthumb, lady's-thumb, ladysthumb smartweed, smartweed, spotted knotweed, spotted ladysthumb, spotted smartweed.

Taxonomic Hierarchy: (ITIS TSN=20915, click for more information and references)

        Kingdom: Plantae
            Subkingdom: Tracheobionta
                Division: Magnoliophyta
                    Class: Magnoliopsida
                        Subclass: Caryophyllidae
                            Order: Polygonales
                                Family: Polygonaceae
                                    Genus: Polygonum
                                        Species: Polygonum persicaria


Available images of this specimen (click to view):
specimen image: 04481s1.jpg

Images of other samples of the same species:
specimen image: 02603s1.jpg 
specimen image: 03922s1.jpg 

Nearby Accessions

Other accessions in the database collected near this one:

Accession Name Dist., dir.
04473 Arnica longifolia      "spearleaf arnica" same section
04466 Cerastium fontanum  subsp. vulgare   "big mouse-ear chickweed" same section
04465 Mentha arvensis      "wild mint" same section
04491 Pterospora andromedea      "woodland pinedrops" 2.1 mi. S
04474 Symphyotrichum spathulatum      "western mountain aster" same section
04528 Utricularia vulgaris     same section


Nearby locations from the USGS Geographic Name Information System (GNIS) database:

Name County Dist., dir. Elevation (ft.) 7.5' Quad Name
Duck Lake (Lake) San Juan County, UT 237 ft. SW 8698  Poison Canyon 
Duck Lake Point of Interest (Locale) San Juan County, UT 1321 ft. W 8708  Poison Canyon 
North Elk Ridge (Ridge) San Juan County, UT 2005 ft. W 8770  Poison Canyon 
Gooseberry Ranger Station (Locale) San Juan County, UT 0.7 mi. N 8537  Poison Canyon 
Poso Pasture (Flat) San Juan County, UT 1.1 mi. S 8488  Poison Canyon 
Redd Pasture (Flat) San Juan County, UT 1 mi. W 8540  Poison Canyon 
Sego Flat (Flat) San Juan County, UT 2 mi. N 8750  Poison Canyon 
Sego Spring (Spring) San Juan County, UT 2.1 mi. N 8741  Poison Canyon 
Deadman Point (Cape) Grand County, UT 2.4 mi. W 8695  Poison Canyon 
Round Mountain (Summit) San Juan County, UT 2.8 mi. NE 8419  Chippean Rocks 
North Notch Spring (Spring) San Juan County, UT 3.5 mi. S 8550  Poison Canyon 
Chimney Park (Flat) San Juan County, UT 3.6 mi. S 7753  Poison Canyon 
Chimney Park (Area) San Juan County, UT 3.9 mi. S 7356  Poison Canyon 
Deadman Canyon (Valley) San Juan County, UT 3.3 mi. NW   Poison Canyon 
Black Bean Mine (Mine) San Juan County, UT 3.3 mi. SE 6683  Chippean Rocks 
Horse Mountain (Summit) San Juan County, UT 4.1 mi. N 9164  Poison Canyon 
Drift Trail Canyon (Valley) San Juan County, UT 4 mi. SW   Poison Canyon 
Davis Pocket (Basin) San Juan County, UT 4.2 mi. N 8157  Poison Canyon 
Avalanche Mine (Mine) San Juan County, UT 3.5 mi. SE 6713  Chippean Rocks 
Horse Flat (Flat) San Juan County, UT 3.6 mi. SE 7123  Chippean Rocks 


Taxon Links for species Polygonum persicaria  L.

CalPhotos, Berkeley Digital Library Project

CNPS Manual of California Vegetation Database

USDA Plants database
University of Washington Herbarium: Plants of Washington (images)

Texas A&M University: Image Library (images)

Lady Bird Johnson's Wildflower Center

Google Images

External link to this species in the UVU Herbarium:

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