Polygonum nesomii

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Polygonum nesomii
Poly robu.jpg
Synonym Polygonella robusta shown, Photo by Shirley Denton (Copyrighted, use by photographer’s permission only), Nature Photography by Shirley Denton
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida – Dicotyledons
Order: Caryophyllales
Family: Polygonaceae
Genus: Polygonella
Species: P. nesomii
Binomial name
Polygonum nesomii
(Small) G.L. Nesom & V.M. Bates
Poly robu dist.jpg
Natural range of Polygonum nesomii from USDA NRCS Plants Database.

Common name: Largeflower jointweed

Taxonomic notes

Synonyms: Polygonella robusta (Small) G.L. Nesom & Bates; Polygonella fimbriata (Elliott) Horton var. robusta (Small) Horton; Thysanella robusta Small


A description of Polygonum nesomii is provided in The Flora of North America.


P. nesomii can be found in sandy habitat throughout Florida.[1]



In the Coastal Plain in Florida, P. robusta can occur in sandy old fields, Florida rosemary scrubs, sand dunes, and xeric oak/saw palmetto scrubs.[2] Associated species include saw palmetto and scrub oaks.


The flowers range from light pink to deep pink with the colors changing as the flowers mature and age, eventually turning rusty orange.[3] Blooms throughout summer and fall.[4]

Seed bank and germination

Lindon and Menges (2008) found that germination rates under smoke was less than without smoke.

Germination rates are negatively affected by the allelopathic chemicals leached from the Florida rosemary.[5]

Fire ecology

P. nesomii is an obligate seeder. Weekley and Menges (2003) found that two years post fire, there were individuals established in new areas.


Polygonella robusta has been observed at the Archbold Biological Station to host bees from the Apidae such as Apis mellifera, Bombus impatiens, plasterer bees from the Colletidae family such as Colletes mandibularis, Hylaeus confluens, sweat bees from the Halictidae family such as Augochlorella aurata, Augochloropsis anonyma, A. sumptuosa, Lasioglossum miniatulus, L. nymphalis, L. placidensis, Sphecodes heraclei, wasps from the Leucospididae family such as Leucospis robertsoni, L. slossonae, leafcutting bees from the Megachilidae family such as Anthidiellum perplexum, Coelioxys octodentata, C. sayi, Megachile albitarsis, spider wasps from the Pompilidae family such as Anoplius marginalis, Episyron conterminus posterus, Paracyphonyx funereus, thread-waisted wasps from the Sphecidae family such as Bembix sayi, Bicyrtes capnoptera, Cerceris flavofasciata floridensis, Ectemnius rufipes ais, Isodontia exornata, Larra bicolor, Oxybelus emarginatus, O. laetus fulvipes, Philanthus politus, P. ventilabris, Tachysphex similis, Tachytes grisselli, T. validus, and wasps from the Vespidae family such as Eumenes fraternus, E. smithii, Euodynerus boscii boharti, Monobia quadridens, Pachodynerus erynnis, Parancistrocerus salcularis rufulus, Polistes bellicosus, P. dorsalis hunteri, Pseudodynerus quadrisectus, Stenodynerus beameri, S. fundatiformis, S. histrionalis rufustus, S. lineatifrons, S. oculeus, S. pulvinatus surrufus, Zethus slossonae.[6] Additionally, P. robusta has been observed with ground-nesting bees from the Andrenidae family such as Andrena nigrocaerulea, aphids from the Aphididae family such as Aphis sp., bees from the Apidae family such as Bombus impatiens and Trigona spinipes, plasterer bees from the Colletidae family such as Colletes speculiferus, leaf-footed bugs from the Coreidae family such as Leptoglossus phyllopus, planthoppers from the Dictyopharidae family such as Scolops sulcipes, and plant bugs from the Miridae family such as Lygus lineolaris.[7]

Conservation, cultivation, and restoration

Cultural use

Photo Gallery

References and notes

Lindon, H. L. and E. Menges (2008). "Scientific Note: Effects of Smoke on Seed Germination of Twenty Species of Fire-Prone Habitats in Florida." Castanea 73(2): 106-110.

Weekley, C. W. and E. S. Menges (2003). "Species and Vegetation Responses to Prescribed Fire in a Long-Unburned, Endemic-Rich Lake Wales Ridge Scrub." The Journal of the Torrey Botanical Society 130(4): 265-282.

  1. Satya, M.-W., E. S. Menges, et al. (2005). "Microhabitat Distribution of Two Florida Scrub Endemic Plants in Comparison to Their Habitat-Generalist Congeners." American Journal of Botany 92(3): 411-421.
  2. Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: November 2015. Collectors: K. Godfrey, Robert L. Lazor, Julie Neel, Cecil R. Slaughter. States and Counties: Florida: Franklin, Madison, Osceola, Wakulla. Compiled by Tall Timbers Research Station and Land Conservancy.
  3. [[1]]
  4. [[2]]Floridata. Accessed: February 25, 2016
  5. Hewitt, R. E. and E. S. Menges (2008). "Allelopathic Effects of Ceratiola ericoides (Empetraceae) on Germination and Survival of Six Florida Scrub Species." Plant Ecology 198(1): 47-59
  6. Deyrup, M.A. and N.D. 2015. Database of observations of Hymenoptera visitations to flowers of plants on Archbold Biological Station, Florida, USA.
  7. Discoverlife.org [3]