Louisiana

• Acadia 22001
  964 taxa Open ↗
• Allen 22003
  1,426 taxa Open ↗
• Ascension 22005
  551 taxa Open ↗
• Assumption 22007
  456 taxa Open ↗
• Avoyelles 22009
  803 taxa Open ↗
• Beauregard 22011
  1,018 taxa Open ↗
• Bienville 22013
  1,400 taxa Open ↗
• Bossier 22015
  1,395 taxa Open ↗
• Caddo 22017
  1,796 taxa Open ↗
• Calcasieu 22019
  1,531 taxa Open ↗

Showing 2,551–2,600 of 2,926 (native).

• 
  Spermacoce glabra Michx. Native SPGL2

  smooth false buttonweed · Rubiaceae 39 counties
• 
  Spermolepis divaricata (Walter) Raf. ex Ser. Native SPDI2

  roughfruit scaleseed · Apiaceae 17 counties
• 
  Spermolepis echinata (Nutt. ex DC.) A. Heller Native SPEC2

  bristly scaleseed · Apiaceae 30 counties
• 
  Spermolepis inermis (Nutt. ex DC.) Mathias & Constance Native SPIN

  Red River scaleseed · Apiaceae 17 counties
• 
  Sphenopholis filiformis (Chapm.) Scribn. Native SPFI

  longleaf wedgescale · Poaceae 19 counties
• 
  Sphenopholis intermedia (Rydb.) Rydb. Native SPIN3

  slender wedgescale · Poaceae 25 counties
• 
  Sphenopholis longiflora (Vasey) Hitchc. Native SPLO

  Texas wedgescale · Poaceae 13 counties
• 
  Sphenopholis nitida (Biehler) Scribn. Native SPNI

  shiny wedgescale · Poaceae 19 counties
• 
  Sphenopholis obtusata (Michx.) Scribn. Native SPOB

  prairie wedgescale · Poaceae 62 counties
• 
  Sphenopholis pensylvanica (L.) Hitchc. Native SPPE3

  swamp wedgescale · Poaceae 12 counties
• ⚘
  Sphenopholis ×pallens (Biehler) Scribn. (pro sp.) [obtusata × pensylvanica] Native SPPA7

  wedgescale · Poaceae 2 counties
• 
  Spigelia marilandica (L.) L. Native SPMA3

  woodland pinkroot · Loganiaceae 37 counties
• 
  Spiraea tomentosa L. Native SPTO2

  steeplebush · Rosaceae 1 county
• 
  Spiraea virginiana Britton Native SPVI2

  Virginia meadowsweet · Rosaceae 1 county
• 
  Spiranthes brevilabris Lindl. Native SPBR

  Texas lady's tresses · Orchidaceae 1 county
• 
  Spiranthes cernua (L.) Rich. Native SPCE

  nodding lady's tresses · Orchidaceae 35 counties
• 
  Spiranthes lacera (Raf.) Raf. Native SPLA4

  northern slender lady's tresses · Orchidaceae 20 counties
• 
  Spiranthes lacera (Raf.) Raf. var. gracilis (Bigelow) Luer Native SPLAG

  northern slender lady's tresses · Orchidaceae 20 counties
• 
  Spiranthes laciniata (Small) Ames Native SPLA3

  lacelip lady's tresses · Orchidaceae 13 counties
• 
  Spiranthes longilabris Lindl. Native SPLO2

  giantspiral lady's tresses · Orchidaceae 9 counties
• 
  Spiranthes magnicamporum Sheviak Native SPMA5

  Great Plains lady's tresses · Orchidaceae 1 county
• 
  Spiranthes odorata (Nutt.) Lindl. Native SPOD

  marsh lady's tresses · Orchidaceae 35 counties
• 
  Spiranthes ovalis Lindl. Native SPOV

  October lady's tresses · Orchidaceae 19 counties
• 
  Spiranthes praecox (Walter) S. Watson Native SPPR2

  greenvein lady's tresses · Orchidaceae 34 counties
• 
  Spiranthes tuberosa Raf. Native SPTU

  little lady's tresses · Orchidaceae 20 counties
• 
  Spiranthes vernalis Engelm. & A. Gray Native SPVE

  spring lady's tresses · Orchidaceae 49 counties
• 
  Spirodela polyrrhiza (L.) Schleid. Native SPPO

  common duckmeat · Lemnaceae 31 counties
• 
  Sporobolus clandestinus (Biehler) Hitchc. Native SPCL

  rough dropseed · Poaceae 25 counties
• 
  Sporobolus compositus (Poir.) Merr. Native SPCO16

  composite dropseed · Poaceae 19 counties
• 
  Sporobolus compositus (Poir.) Merr. var. compositus Native SPCOC2

  composite dropseed · Poaceae 4 counties
• 
  Sporobolus compositus (Poir.) Merr. var. drummondii (Trin.) Kartesz & Gandhi Native SPCOD3

  Drummond's dropseed · Poaceae 11 counties
• 
  Sporobolus compositus (Poir.) Merr. var. macer (Trin.) Kartesz & Gandhi Native SPCOM

  composite dropseed · Poaceae 12 counties
• 
  Sporobolus cryptandrus (Torr.) A. Gray Native SPCR

  sand dropseed · Poaceae 14 counties
• 
  Sporobolus junceus (P. Beauv.) Kunth Native SPJU

  pineywoods dropseed · Poaceae 24 counties
• 
  Sporobolus neglectus Nash Native SPNE2

  puffsheath dropseed · Poaceae 2 counties
• 
  Sporobolus pyramidatus (Lam.) Hitchc. Native SPPY2

  Madagascar dropseed · Poaceae 9 counties
• 
  Sporobolus silveanus Swallen Native SPSI2

  Silveus' dropseed · Poaceae 2 counties
• 
  Sporobolus vaginiflorus (Torr. ex A. Gray) Alph. Wood Native SPVA

  poverty dropseed · Poaceae 15 counties
• 
  Sporobolus vaginiflorus (Torr. ex A. Gray) Alph. Wood var. ozarkanus (Fernald) Shinners Native SPVAO

  Ozark dropseed · Poaceae 4 counties
• 
  Sporobolus vaginiflorus (Torr. ex A. Gray) Alph. Wood var. vaginiflorus Native SPVAV2

  poverty dropseed · Poaceae 13 counties
• 
  Sporobolus virginicus (L.) Kunth Native SPVI3

  seashore dropseed · Poaceae 7 counties
• 
  Stachys crenata Raf. Native STCR7

  mousesear · Lamiaceae 52 counties
• 
  Stachys floridana Shuttlw. ex Benth. Native STFL4

  Florida hedgenettle · Lamiaceae 36 counties
• 
  Stachys tenuifolia Willd. Native STTE

  smooth hedgenettle · Lamiaceae 53 counties
• 
  Staphylea trifolia L. Native STTR

  American bladdernut · Staphyleaceae 2 counties
• 
  Steinchisma hians (Elliott) Nash Native STHI3

  gaping grass · Poaceae 51 counties
• 
  Stellaria alsine Grimm Native STAL4

  bog chickweed · Caryophyllaceae 1 county
• ⚘
  Stellaria prostrata Baldw. Native STPR

  prostrate starwort · Caryophyllaceae 12 counties
• 
  Stenanthium gramineum (Ker Gawl.) Morong Native STGR2

  eastern featherbells · Liliaceae 8 counties
• 
  Stenanthium gramineum (Ker Gawl.) Morong var. gramineum Native STGRG2

  eastern featherbells · Liliaceae 8 counties