Umatilla County

Showing 1,301–1,350 of 1,444.

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  Stellaria umbellata Turcz. ex Kar. & Kir. Native STUM

  umbrella starwort · Caryophyllaceae
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  Stenotus lanuginosus (A. Gray) Greene Native STLA7

  woolly mock goldenweed · Asteraceae
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  Stephanomeria paniculata Nutt. Native STPA2

  tufted wirelettuce · Asteraceae
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  Streptopus amplexifolius (L.) DC. Both STAM2

  claspleaf twistedstalk · Liliaceae
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  Stuckenia pectinata (L.) Börner Native STPE15

  sago pondweed · Potamogetonaceae
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  Suaeda calceoliformis (Hook.) Moq. Native SUCA2

  Pursh seepweed · Chenopodiaceae
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  Swertia perennis L. Native SWPE

  felwort · Gentianaceae
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  Symphoricarpos albus (L.) S.F. Blake Native SYAL

  common snowberry · Caprifoliaceae
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  Symphoricarpos oreophilus A. Gray Native SYOR2

  mountain snowberry · Caprifoliaceae
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  Symphoricarpos oreophilus A. Gray var. utahensis (Rydb.) A. Nelson Native SYORU

  Utah snowberry · Caprifoliaceae
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  Symphyotrichum ascendens (Lindl.) G.L. Nesom Native SYAS3

  western aster · Asteraceae
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  Symphyotrichum chilense (Nees) G.L. Nesom Native SYCH4

  Pacific aster · Asteraceae
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  Symphyotrichum chilense (Nees) G.L. Nesom var. chilense Native SYCHC

  Pacific aster · Asteraceae
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  Symphyotrichum eatonii (A. Gray) G.L. Nesom Native SYEA2

  Eaton's aster · Asteraceae
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  Symphyotrichum ericoides (L.) G.L. Nesom Native SYER

  white heath aster · Asteraceae
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  Symphyotrichum ericoides (L.) G.L. Nesom var. pansum (S.F. Blake) G.L. Nesom Native SYERP2

  manyflowered aster · Asteraceae
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  Symphyotrichum foliaceum (Lindl. ex DC.) G.L. Nesom Native SYFO2

  alpine leafybract aster · Asteraceae
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  Symphyotrichum foliaceum (Lindl. ex DC.) G.L. Nesom var. parryi (D.C. Eaton) G.L. Nesom Native SYFOP

  Parry's aster · Asteraceae
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  Symphyotrichum frondosum (Nutt.) G.L. Nesom Native SYFR2

  short-rayed alkali aster · Asteraceae
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  Symphyotrichum spathulatum (Lindl.) G.L. Nesom Native SYSP

  western mountain aster · Asteraceae
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  Symphyotrichum spathulatum (Lindl.) G.L. Nesom var. spathulatum Native SYSPS

  western mountain aster · Asteraceae
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  Symphyotrichum subspicatum (Nees) G.L. Nesom Native SYSU4

  Douglas aster · Asteraceae
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  Symphyotrichum subspicatum (Nees) G.L. Nesom var. subspicatum Native SYSUS

  Douglas aster · Asteraceae
• 
  Symphytum officinale L. Introduced SYOF

  common comfrey · Boraginaceae
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  Synthyris missurica (Raf.) Pennell Native SYMI

  tailed kittentails · Scrophulariaceae
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  Syringa vulgaris L. Introduced SYVU

  common lilac · Oleaceae
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  Taeniatherum caput-medusae (L.) Nevski Introduced TACA8

  medusahead · Poaceae
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  Tanacetum balsamita L. Introduced TABA

  costmary · Asteraceae
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  Tanacetum parthenium (L.) Sch. Bip. Introduced TAPA6

  feverfew · Asteraceae
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  Tanacetum vulgare L. Introduced TAVU

  common tansy · Asteraceae
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  Taraxacum laevigatum (Willd.) DC. Introduced TALA2

  rock dandelion · Asteraceae
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  Taraxacum officinale F.H. Wigg. Both TAOF

  common dandelion · Asteraceae
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  Taxus brevifolia Nutt. Native TABR2

  Pacific yew · Taxaceae
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  Tetradymia canescens DC. Native TECA2

  spineless horsebrush · Asteraceae
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  Thalictrum fendleri Engelm. ex A. Gray Native THFE

  Fendler's meadow-rue · Ranunculaceae
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  Thalictrum occidentale A. Gray Native THOC

  western meadow-rue · Ranunculaceae
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  Thalictrum occidentale A. Gray var. occidentale Native THOCO2

  western meadow-rue · Ranunculaceae
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  Thalictrum venulosum Trel. Native THVE

  veiny meadow-rue · Ranunculaceae
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  Thelypodium laciniatum (Hook.) Endl. ex Walp. Native THLA

  cutleaf thelypody · Brassicaceae
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  Thelypodium milleflorum A. Nelson Native THMI5

  manyflower thelypody · Brassicaceae
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  Thermopsis gracilis Howell Native THGR6

  slender goldenbanner · Fabaceae
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  Thermopsis gracilis Howell var. ovata (B.L. Rob. ex Piper) M. Mendenhall Native THGRO

  slender goldenbanner · Fabaceae
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  Thinopyrum intermedium (Host) Barkworth & D.R. Dewey Introduced THIN6

  intermediate wheatgrass · Poaceae
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  Thlaspi arvense L. Introduced THAR5

  field pennycress · Brassicaceae
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  Thysanocarpus curvipes Hook. Native THCU

  sand fringepod · Brassicaceae
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  Tiarella trifoliata L. Native TITR

  threeleaf foamflower · Saxifragaceae
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  Tiarella trifoliata L. var. unifoliata (Hook.) Kurtz Native TITRU

  oneleaf foamflower · Saxifragaceae
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  Tiquilia nuttallii (Hook.) A.T. Richardson Native TINU2

  Nuttall's crinklemat · Boraginaceae
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  Torreyochloa pallida (Torr.) Church Native TOPA6

  pale false mannagrass · Poaceae
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  Torreyochloa pallida (Torr.) Church var. pauciflora (J. Presl) J.I. Davis Native TOPAP3

  pale false mannagrass · Poaceae