Virginia

• Accomack 51001
  1,201 taxa Open ↗
• Albemarle 51003
  1,479 taxa Open ↗
• Alexandria (city) 51510
  1 taxa Open ↗
• Alleghany 51005
  1,296 taxa Open ↗
• Amelia 51007
  1,090 taxa Open ↗
• Amherst 51009
  1,290 taxa Open ↗
• Appomattox 51011
  918 taxa Open ↗
• Arlington 51013
  1,096 taxa Open ↗
• Augusta 51015
  1,556 taxa Open ↗
• Bath 51017
  1,158 taxa Open ↗

Showing 601–650 of 750 (introduced).

• 
  Salsola kali L. Introduced SAKA

  Russian thistle · Chenopodiaceae 14 counties
• 
  Salsola tragus L. Introduced SATR12

  prickly Russian thistle · Chenopodiaceae 6 counties
• 
  Salvia officinalis L. Introduced SAOF2

  kitchen sage · Lamiaceae 2 counties
• 
  Salvia pratensis L. Introduced SAPR2

  introduced sage · Lamiaceae 1 county
• 
  Salvia sclarea L. Introduced SASC2

  Europe sage · Lamiaceae 1 county
• 
  Salvia verbenaca L. Introduced SAVE12

  wild clary · Lamiaceae 1 county
• 
  Salvinia molesta Mitchell Introduced SAMO5

  kariba-weed · Salviniaceae 1 county
• 
  Sanguisorba minor Scop. Introduced SAMI3

  small burnet · Rosaceae 2 counties
• 
  Sanguisorba minor Scop. ssp. balearica (Bourg. ex Nyman) M. Garm. & C. Navarro Introduced SAMIB2

  small burnet · Rosaceae 2 counties
• 
  Saponaria officinalis L. Introduced SAOF4

  bouncingbet · Caryophyllaceae 95 counties
• 
  Schedonorus arundinaceus (Schreb.) Dumort., nom. cons. Introduced SCAR7

  tall fescue · Poaceae 1 county
• 
  Schedonorus pratensis (Huds.) P. Beauv. Introduced SCPR4

  meadow fescue · Poaceae 84 counties
• 
  Scleranthus annuus L. Introduced SCAN2

  German knotgrass · Caryophyllaceae 63 counties
• 
  Sclerochloa dura (L.) P. Beauv. Introduced SCDU2

  common hardgrass · Poaceae 1 county
• 
  Secale cereale L. Introduced SECE

  cereal rye · Poaceae 1 county
• 
  Securigera varia (L.) Lassen Introduced SEVA4

  crownvetch · Fabaceae 53 counties
• 
  Sedum acre L. Introduced SEAC

  goldmoss stonecrop · Crassulaceae 5 counties
• 
  Sedum sarmentosum Bunge Introduced SESA

  stringy stonecrop · Crassulaceae 22 counties
• 
  Senecio vulgaris L. Introduced SEVU

  old-man-in-the-Spring · Asteraceae 14 counties
• 
  Senna occidentalis (L.) Link Introduced SEOC2

  septicweed · Fabaceae 2 counties
• 
  Sesbania punicea (Cav.) Benth. Introduced SEPU7

  rattlebox · Fabaceae 1 county
• 
  Setaria faberi Herrm. Introduced SEFA

  Japanese bristlegrass · Poaceae 83 counties
• 
  Setaria italica (L.) P. Beauv. Introduced SEIT

  foxtail millet · Poaceae 19 counties
• 
  Setaria pumila (Poir.) Roem. & Schult. Introduced SEPU8

  yellow foxtail · Poaceae 1 county
• 
  Setaria pumila (Poir.) Roem. & Schult. ssp. pumila Introduced SEPUP2

  yellow foxtail · Poaceae 1 county
• 
  Setaria verticillata (L.) P. Beauv. Introduced SEVE3

  hooked bristlegrass · Poaceae 5 counties
• 
  Setaria viridis (L.) P. Beauv. Introduced SEVI4

  green bristlegrass · Poaceae 74 counties
• 
  Setaria viridis (L.) P. Beauv. var. major (Gaudin) Pospichal Introduced SEVIM

  green bristlegrass · Poaceae 1 county
• 
  Setaria viridis (L.) P. Beauv. var. viridis Introduced SEVIV

  green bristlegrass · Poaceae 73 counties
• 
  Sherardia arvensis L. Introduced SHAR2

  blue fieldmadder · Rubiaceae 47 counties
• 
  Silene armeria L. Introduced SIAR

  sweet William silene · Caryophyllaceae 10 counties
• 
  Silene dichotoma Ehrh. Introduced SIDI2

  forked catchfly · Caryophyllaceae 16 counties
• 
  Silene gallica L. Introduced SIGA

  common catchfly · Caryophyllaceae 1 county
• 
  Silene latifolia Poir. Introduced SILA21

  bladder campion · Caryophyllaceae 87 counties
• 
  Silene latifolia Poir. ssp. alba (Mill.) Greuter & Burdet Introduced SILAA3

  bladder campion · Caryophyllaceae 87 counties
• 
  Silene noctiflora L. Introduced SINO

  nightflowering silene · Caryophyllaceae 13 counties
• 
  Silene vulgaris (Moench) Garcke Introduced SIVU

  maidenstears · Caryophyllaceae 50 counties
• 
  Silybum marianum (L.) Gaertn. Introduced SIMA3

  blessed milkthistle · Asteraceae 2 counties
• 
  Sinapis arvensis L. Introduced SIAR4

  charlock mustard · Brassicaceae 1 county
• 
  Sinapis arvensis L. ssp. arvensis Introduced SIARA

  wild mustard · Brassicaceae 1 county
• 
  Sisymbrium altissimum L. Introduced SIAL2

  tall tumblemustard · Brassicaceae 16 counties
• 
  Sisymbrium officinale (L.) Scop. Introduced SIOF

  hedgemustard · Brassicaceae 62 counties
• 
  Solanum dulcamara L. Introduced SODU

  climbing nightshade · Solanaceae 39 counties
• 
  Solanum dulcamara L. var. dulcamara Introduced SODUD

  climbing nightshade · Solanaceae 39 counties
• 
  Solanum physalifolium Rusby Introduced SOPH

  hoe nightshade · Solanaceae 9 counties
• 
  Soliva sessilis Ruiz & Pav. Introduced SOSE2

  field burrweed · Asteraceae 1 county
• 
  Sonchus arvensis L. Introduced SOAR2

  field sowthistle · Asteraceae 9 counties
• 
  Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman Introduced SOARU

  moist sowthistle · Asteraceae 9 counties
• 
  Sonchus asper (L.) Hill Introduced SOAS

  spiny sowthistle · Asteraceae 83 counties
• 
  Sonchus oleraceus L. Introduced SOOL

  common sowthistle · Asteraceae 29 counties