Plantae > Tracheophyta > Magnoliopsida > Caryophyllales > Polygonaceae > Persicaria > Persicaria minor

Persicaria minor (ladysthumb smartweed; ladysthumb; lady's-thumb; smartweed; spotted knotweed; spotted ladysthumb; spotted smartweed)

Synonyms: Persicaria minor subsp. depressa; Persicaria pumila; Persicaria stricta; Persicaria tenella; Persicaria tenella var. kawagoeana; Peutalis minus; Polygonum angustifolium; Polygonum banca; Polygonum banka; Polygonum daphnophyllum; Polygonum intermedium; Polygonum minus; Polygonum minus subsp. depressum; Polygonum minus var. subcontinuum; Polygonum posumbu; Polygonum strictum; Polygonum tenellum; Polygonum vulgare


Height [3]  24 inches (0.6 m)
Allergen Potential [1]  Medium-High
Screening - Summer [2]  Moderate
Screening - Winter [2]  Porous
Hardiness Zone Minimum [2]  USDA Zone: 10 Low Temperature: 30 F° (-1.1 C°) → 40 F° (4.4 C°)
Light Preference [2]  Full Sun
Soil Acidity [2]  Neutral
Soil Fertility [2]  Infertile
Water Use [2]  Moderate
Flower Color [2]  Red
Foliage Color [2]  Green
Fruit Color [2]  Black
Flower Conspicuous [2]  Yes
Bloom Period [2]  Spring
Drought Tolerance [2]  Medium
Edible [3]  May be edible. See the Plants For A Future link below for details.
Fire Tolerance [2]  Medium
Flower Type [3]  Hermaphrodite
Frost Free Days [2]  3 months 20 days
Fruit/Seed Abundance [2]  Medium
Fruit/Seed Begin [2]  Spring
Fruit/Seed End [2]  Fall
Growth Form [2]  Single Crown
Growth Period [2]  Spring
Growth Rate [2]  Rapid
Hazards [3]  Although no specific mention has been made for this species, there have been reports that some members of this genus can cause photosensitivity in susceptible people. Many species also contain oxalic acid (the distinctive lemony flavour of sorrel) - whilst not toxic this substance can bind up other minerals making them unavailable to the body and leading to mineral deficiency. Having said that, a number of common foods such as sorrel and rhubarb contain oxalic acid and the leaves of most members of this genus are nutritious and beneficial to eat in moderate quantities. Cooking the leaves will reduce their content of oxalic acid. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition;
Leaf Type [2]  Deciduous
Lifespan [3]  Annual
Pollinators [3]  Bats
Propagation [2]  Seed
Regrowth Rate [2]  Slow
Root Depth [2]  14 inches (36 cm)
Seed Spread Rate [2]  Rapid
Seed Vigor [2]  Medium
Seeds Per [2]  255775 / lb (563887 / kg)
Shape/Orientation [2]  Erect
Structure [4]  Herb
Usage [3]  A yellow dye is obtained from the plant when alum is used as a mordant;
Vegetative Spread Rate [2]  None
View Plants For A Future Record : Persicaria minor

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Acadia National Park II 35996 Maine, United States
Algonquin Provincial Park IV 1868802 Ontario, Canada
Assateague Island National Seashore II 8621 Maryland, United States
Astrakhanskiy Biosphere Reserve Zapovednik Ia 167827 Astrakhan, Russia
Belovezhskaya Pushcha Biosphere Reserve National Park II 218515 Belarus
Berchtesgaden Alps National Park II 51433 Germany
Bialowieza National Park II 11126 Poland
Blue Ridge Parkway National Parkway V 73611 North Carolina, Virginia, United States
Bluestone National Scenic River National River and Wild and Scenic Riverway V 3517 West Virginia, United States
Bolshekhekhtsirsky Zapovednik Ia 112282 Khabarovsk, Russia
Booker T. Washington National Monument V 237 Virginia, United States
Bruce Peninsula National Park II   Ontario, Canada
Calvin College Ecosystem Preserve 90 Michigan, United States
Canaveral National Seashore II 9090 Florida, United States
Cape Breton Highlands National Park II 234333 Nova Scotia, Canada  
Carpathian Biosphere Reserve 144772 Ukraine  
Catoctin Mountain Park National Park II 5994 Maryland, United States
Central Gulf Coastal Plain Biosphere Reserve 40530 United States  
Chippewa Nature Center   Michigan, United States    
Colonial National Historic Park National Historical Park V 9316 Virginia, United States
Cumberland Gap National Hist. Park National Historical Park V 24282 Kentucky, Tennessee, Virginia, United States
Edwin S. George Reserve 1297 Michigan, United States
El Palmar National Park II   Entre Rios, Argentina  
Forêts et lac de Bambois (Fosses-la-Ville; Mettet) 885 Belgium  
Forillon National Park II 61010 Quebec, Canada  
Fort Donelson National Battlefield III 560 Tennessee, United States
Friendship Hill National Historic Site III 697 Pennsylvania, United States
Fundy National Park II 52716 New Brunswick, Canada
Gateway National Recreation Area V 1807 New Jersey, United States
Gauley River National Recreation Area V 10157 West Virginia, United States
Georgian Bay Islands National Park II   Ontario, Canada
Gettysburg National Military Park V 3560 Pennsylvania, United States
Grand Canyon National Park II 1210128 Arizona, United States
Great Smoky Mountains National Park II 515454 North Carolina, Tennessee, United States
Gros Morne National Park II 476632 Newfoundland, Canada
Gwaii Haanas National Park Reserve II 366714 British Columbia, Canada
Hopewell Furnace National Historic Site III 861 Pennsylvania, United States
Hubbard Brook Biosphere Reserve 7809 New Hampshire, United States
Indiana Dunes National Lakeshore II 8272 Indiana, United States
Isle of Rum National Nature Reserve   Scotland, United Kingdom
Kavkazskiy Biosphere Reserve Ia 692723 Krasnodar, Karachay-Cherkessia, Adygea, Russia
Kejimkujik National Park II 94203 Nova Scotia, Canada
Khopersky Zapovednik Ia 47103 Russia  
Kouchibouguac National Park II 59161 New Brunswick, Canada
Lago Puelo National Park II 47607 Chubut, Argentina
Lake Superior Provincial Park IV 351011 Ontario, Canada
Lanín National Park II 536819 Neuquen, Argentina
Laplandskiy Biosphere Reserve 757114 Russia  
Luberon Regional Nature Park V 406572 France  
Mammoth Cave Area Biosphere Reserve (Natn'l Park) National Park II 51235 Kentucky, United States
Morristown National Historical Park VI 1677 New Jersey, United States
Mount Arrowsmith Biosphere Reserve 293047 British Columbia, Canada  
Mount Mitchell State Park   North Carolina, United States
Mount Revelstoke National Park Ia 18 British Columbia, Canada
New River Gorge National River National River and Wild and Scenic Riverway V 55591 West Virginia, United States
Niagara Escarpment Biosphere Reserve 470167 Ontario, Canada  
Ocmulgee National Monument V 693 Georgia, United States
Oconee National Forest Botanical Reserve 306 Georgia, United States  
Okskiy Biosphere Reserve 190748 Russia  
Pacific Rim National Park Reserve II 137900 British Columbia, Canada
Palava Protected Landscape Area V   Czech Republic  
Palu' di Borghetto 20 Italy  
Parco Del Somma-Vesuvio e Miglio D'Oro National Park II 33648 Italy
Parco Nazionale del Circeo 54771 Italy  
Pipestone National Monument V 326 Minnesota, United States
Point Pelee National Park II 5764 Ontario, Canada
Prince Edward Island National Park II   Prince Edward Island, Canada  
Reserva de la Biosfera de Urdaibai Biosphere Reserve V 1777 Spain  
Richmond National Battlefield Park III 1517 Virginia, United States
Riding Mountain Biosphere Reserve II 762028 Manitoba, Canada
Rondeau Provincial Park II 5035 Ontario, Canada
Roosevelt Vanderbilt National Historic Site   New York, United States      
Saint Lawrence Islands National Park II   Ontario, Canada
Sayano-Shushenskiy Biosphere Reserve Ia 964620 Krasnoyarsk, Russia
Southern Appalachian Biosphere Reserve 37548505 North Carolina, Tennessee, United States  
Taynish National Nature Reserve   Scotland, United Kingdom
Tennessee River Gorge   Tennessee, United States
Tigrovaia Balka Zapovednik State Nature Reserve Ia 146860 Tajikistan  
Tsentral'no-Lesnoy Biosphere Reserve Ia 62630 Russia  
Tsentral'no-Sibirskiy Biosphere Reserve Ia 2521510 Krasnoyarsk, Russia
Ukrainskii Stepnoi Zapovednik Nature Zapovednik Ia 2920 Ukraine  
Upper Miss. River Nat'l Wildlife Refuge National Wildlife Refuge VI 25823 Illinois, Iowa, Wisconsin, United States
Vallées de l'Oise et de la Wartoise (Chimay; Momignies) 1873 Belgium  
Valley Forge National Historical Park VI 3509 Pennsylvania, United States
Voronezhskiy Biosphere Reserve 95835 Russia  
Western Michigan University's Asylum Lake Preserve 274 Michigan, United States
Wind Cave National Park II 29471 South Dakota, United States
Wood Buffalo National Park II 11038545 Alberta, Canada
Zhuvintas Zapovednik 18223 Lithuania  
Zion National Park II 135667 Utah, United States



Agrotis clavis (Heart and Club)[5]
Ametastegia equiseti <Unverified Name>[5]
Aphalara polygoni[5]
Aphis fabae (Bean aphid)[5]
Aphis nasturtii (buckthorn aphid)[5]
Calybites phasianipennella[5]
Clepsis consimilana[6]
Coreus marginatus (dock bug)[5]
Epidemia helloides[7]
Gastrophysa viridula <Unverified Name>[6]
Grammodes geometrica[7]
Hypera rumicis[6]
Idaea dilutaria (Silky Wave)[5]
Idaea straminata (Plain Wave)[5]
Orthonama obstipata <Unverified Name>[5]
Pachynematus albipennis <Unverified Name>[5]
Phytobius comari[5]
Phytobius quadrituberculatus[5]
Protoemphytus perla <Unverified Name>[5]
Pyrrharctia isabella (banded woollybear)[7]
Pyrrhia umbra (Bordered Sallow)[5]
Rhinoncus albicinctus[5]
Rhinoncus bruchoides[5]
Rhinoncus perpendicularis[5]
Scopula floslactata (Cream Wave Moth)[6]
Tenthredo mesomela <Unverified Name>[6]
Tenthredo mesomelas <Unverified Name>[5]
Timandra griseata[5]
Trachea atriplicis (Orache Moth)[5]
Wachtliella persicariae[5]
Xanthorhoe spadicearia (Red Twin-spot Carpet Moth)[6]


Pollinated by 
Bombus impatiens[8]
Cerceris arelate[8]
Chloralictus sparsus <Unverified Name>[8]
Chloralictus versatus <Unverified Name>[8]
Chloralictus zephyrus <Unverified Name>[8]
Ectemnius cephalotes[8]
Halictus lerouxii[8]
Oxybelus mexicanus[8]
Phorbia acra <Unverified Name>[8]
Polistes annularis (Large paper wasp)[8]
Pontia protodice (Checkered White)[8]
Syritta pipiens (thick-legged hoverfly)[8]
Villa alternata[8]


Parasitized by 
Pegomya bicolor[6]
Septoria polygonorum[6]


North America; Western Michigan University’s Asylum Lake;



Attributes / relations provided by
1Derived from Allergy-Free Gardening OPALS™, Thomas Leo Ogren (2000)
2USDA Plants Database, U. S. Department of Agriculture
3Plants For A Future licensed under a Creative Commons License
4Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935
5Biological Records Centre Database of Insects and their Food Plants
6Ecology of Commanster
7HOSTS - a Database of the World's Lepidopteran Hostplants Gaden S. Robinson, Phillip R. Ackery, Ian J. Kitching, George W. Beccaloni AND Luis M. Hernández
8Robertson, C. Flowers and insects lists of visitors of four hundred and fifty three flowers. 1929. The Science Press Printing Company Lancaster, PA.
Protected Areas provided by Biological Inventories of the World's Protected Areas in cooperation between the Information Center for the Environment at the University of California, Davis and numerous collaborators.
Calvin College Ecosystem Preserve
Chippewa Nature Center
Edwin S. George Reserve, University of Michigan, Department of Ecology and Evolutionary Biology
Natura 2000, UK data: © Crown copyright and database right [2010] All rights reserved. Ordnance Survey Licence number 100017955
Western Michigan University’s Asylum Lake
Images provided by Google Image Search
Weather provided by NOAA METAR Data Access