Arkansas

• Arkansas 05001
  816 taxa Open ↗
• Ashley 05003
  1,236 taxa Open ↗
• Baxter 05005
  1,025 taxa Open ↗
• Benton 05007
  1,372 taxa Open ↗
• Boone 05009
  697 taxa Open ↗
• Bradley 05011
  1,145 taxa Open ↗
• Calhoun 05013
  573 taxa Open ↗
• Carroll 05015
  1,039 taxa Open ↗
• Chicot 05017
  440 taxa Open ↗
• Clark 05019
  896 taxa Open ↗

Showing 2,301–2,350 of 2,679 (native).

• 
  Solidago rugosa Mill. ssp. aspera (Aiton) Cronquist Native SORUA

  wrinkleleaf goldenrod · Asteraceae 1 county
• 
  Solidago rugosa Mill. ssp. rugosa Native SORUR

  wrinkleleaf goldenrod · Asteraceae 1 county
• 
  Solidago rugosa Mill. ssp. rugosa var. rugosa Native SORUR2

  wrinkleleaf goldenrod · Asteraceae 1 county
• 
  Solidago speciosa Nutt. Native SOSP2

  showy goldenrod · Asteraceae 11 counties
• 
  Solidago speciosa Nutt. var. rigidiuscula Torr. & A. Gray Native SOSPR

  showy goldenrod · Asteraceae 4 counties
• 
  Solidago speciosa Nutt. var. speciosa Native SOSPS4

  showy goldenrod · Asteraceae 7 counties
• 
  Solidago tortifolia Elliott Native SOTO2

  twistleaf goldenrod · Asteraceae 4 counties
• 
  Solidago ulmifolia Muhl. ex Willd. Native SOUL2

  elmleaf goldenrod · Asteraceae 28 counties
• 
  Solidago ulmifolia Muhl. ex Willd. var. microphylla A. Gray Native SOULM

  elmleaf goldenrod · Asteraceae 3 counties
• 
  Solidago ulmifolia Muhl. ex Willd. var. palmeri Cronquist Native SOULP2

  Palmer's goldenrod · Asteraceae 8 counties
• 
  Solidago ulmifolia Muhl. ex Willd. var. ulmifolia Native SOULU2

  elmleaf goldenrod · Asteraceae 21 counties
• 
  Sorghastrum elliottii (C. Mohr) Nash Native SOEL3

  slender Indiangrass · Poaceae 9 counties
• 
  Sorghastrum nutans (L.) Nash Native SONU2

  Indiangrass · Poaceae 40 counties
• 
  Sparganium americanum Nutt. Native SPAM

  American bur-reed · Sparganiaceae 10 counties
• 
  Sparganium androcladum (Engelm.) Morong Native SPAN

  branched bur-reed · Sparganiaceae 5 counties
• 
  Spartina pectinata Bosc ex Link Native SPPE

  prairie cordgrass · Poaceae 10 counties
• 
  Spermacoce glabra Michx. Native SPGL2

  smooth false buttonweed · Rubiaceae 32 counties
• 
  Spermolepis divaricata (Walter) Raf. ex Ser. Native SPDI2

  roughfruit scaleseed · Apiaceae 16 counties
• 
  Spermolepis echinata (Nutt. ex DC.) A. Heller Native SPEC2

  bristly scaleseed · Apiaceae 15 counties
• 
  Spermolepis inermis (Nutt. ex DC.) Mathias & Constance Native SPIN

  Red River scaleseed · Apiaceae 9 counties
• 
  Sphenopholis filiformis (Chapm.) Scribn. Native SPFI

  longleaf wedgescale · Poaceae 1 county
• 
  Sphenopholis intermedia (Rydb.) Rydb. Native SPIN3

  slender wedgescale · Poaceae 1 county
• 
  Sphenopholis longiflora (Vasey) Hitchc. Native SPLO

  Texas wedgescale · Poaceae 1 county
• 
  Sphenopholis nitida (Biehler) Scribn. Native SPNI

  shiny wedgescale · Poaceae 16 counties
• 
  Sphenopholis obtusata (Michx.) Scribn. Native SPOB

  prairie wedgescale · Poaceae 44 counties
• 
  Sphenopholis pensylvanica (L.) Hitchc. Native SPPE3

  swamp wedgescale · Poaceae 1 county
• 
  Spigelia marilandica (L.) L. Native SPMA3

  woodland pinkroot · Loganiaceae 44 counties
• 
  Spiraea tomentosa L. Native SPTO2

  steeplebush · Rosaceae 5 counties
• ⚘
  Spiraea ×billiardii Hérincq (pro sp.) [douglasii × salicifolia] Native SPBI2

  spirea · Rosaceae 1 county
• 
  Spiranthes cernua (L.) Rich. Native SPCE

  nodding lady's tresses · Orchidaceae 39 counties
• 
  Spiranthes lacera (Raf.) Raf. Native SPLA4

  northern slender lady's tresses · Orchidaceae 19 counties
• 
  Spiranthes lacera (Raf.) Raf. var. gracilis (Bigelow) Luer Native SPLAG

  northern slender lady's tresses · Orchidaceae 19 counties
• 
  Spiranthes laciniata (Small) Ames Native SPLA3

  lacelip lady's tresses · Orchidaceae 2 counties
• 
  Spiranthes lucida (H.H. Eaton) Ames Native SPLU2

  shining lady's tresses · Orchidaceae 4 counties
• 
  Spiranthes odorata (Nutt.) Lindl. Native SPOD

  marsh lady's tresses · Orchidaceae 1 county
• 
  Spiranthes ovalis Lindl. Native SPOV

  October lady's tresses · Orchidaceae 6 counties
• 
  Spiranthes ovalis Lindl. var. erostellata Catling Native SPOVE

  October lady's tresses · Orchidaceae 1 county
• 
  Spiranthes ovalis Lindl. var. ovalis Native SPOVO

  October lady's tresses · Orchidaceae 4 counties
• 
  Spiranthes praecox (Walter) S. Watson Native SPPR2

  greenvein lady's tresses · Orchidaceae 4 counties
• 
  Spiranthes tuberosa Raf. Native SPTU

  little lady's tresses · Orchidaceae 27 counties
• 
  Spiranthes vernalis Engelm. & A. Gray Native SPVE

  spring lady's tresses · Orchidaceae 29 counties
• 
  Spirodela polyrrhiza (L.) Schleid. Native SPPO

  common duckmeat · Lemnaceae 15 counties
• 
  Sporobolus clandestinus (Biehler) Hitchc. Native SPCL

  rough dropseed · Poaceae 34 counties
• 
  Sporobolus compositus (Poir.) Merr. Native SPCO16

  composite dropseed · Poaceae 14 counties
• 
  Sporobolus compositus (Poir.) Merr. var. compositus Native SPCOC2

  composite dropseed · Poaceae 8 counties
• 
  Sporobolus compositus (Poir.) Merr. var. drummondii (Trin.) Kartesz & Gandhi Native SPCOD3

  Drummond's dropseed · Poaceae 3 counties
• 
  Sporobolus compositus (Poir.) Merr. var. macer (Trin.) Kartesz & Gandhi Native SPCOM

  composite dropseed · Poaceae 5 counties
• 
  Sporobolus cryptandrus (Torr.) A. Gray Native SPCR

  sand dropseed · Poaceae 9 counties
• 
  Sporobolus heterolepis (A. Gray) A. Gray Native SPHE

  prairie dropseed · Poaceae 4 counties
• 
  Sporobolus junceus (P. Beauv.) Kunth Native SPJU

  pineywoods dropseed · Poaceae 2 counties