Polk County

Showing 451–500 of 683 (native).

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  Physocarpus capitatus (Pursh) Kuntze Native PHCA11

  Pacific ninebark · Rosaceae
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  Pinus monticola Douglas ex D. Don Native PIMO3

  western white pine · Pinaceae
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  Pinus ponderosa Lawson & C. Lawson Native PIPO

  ponderosa pine · Pinaceae
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  Pinus ponderosa Lawson & C. Lawson var. benthamiana (Hartw.) Vasey Native PIPOB2

  ponderosa pine · Pinaceae
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  Pinus ponderosa Lawson & C. Lawson var. ponderosa C. Lawson Native PIPOP

  ponderosa pine · Pinaceae
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  Piperia transversa Suksd. Native PITR3

  royal rein orchid · Orchidaceae
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  Plagiobothrys figuratus (Piper) I.M. Johnst. ex M. Peck Native PLFI

  fragrant popcornflower · Boraginaceae
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  Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. Native PLSC2

  Scouler's popcornflower · Boraginaceae
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  Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. var. scouleri Native PLSCS

  Scouler's popcornflower · Boraginaceae
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  Platanthera dilatata (Pursh) Lindl. ex Beck Native PLDI3

  scentbottle · Orchidaceae
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  Platanthera dilatata (Pursh) Lindl. ex Beck var. leucostachys (Lindl.) Luer Native PLDIL

  Sierra bog orchid · Orchidaceae
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  Plectritis congesta (Lindl.) DC. Native PLCO4

  shortspur seablush · Valerianaceae
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  Pleuricospora fimbriolata A. Gray Native PLFI2

  fringed pinesap · Monotropaceae
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  Pleuropogon refractus (A. Gray) Benth. ex Vasey Native PLRE2

  nodding semaphoregrass · Poaceae
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  Poa laxiflora Buckley Native POLA3

  looseflower bluegrass · Poaceae
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  Poa marcida Hitchc. Native POMA6

  withered bluegrass · Poaceae
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  Poa palustris L. Native POPA2

  fowl bluegrass · Poaceae
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  Polemonium carneum A. Gray Native POCA4

  royal Jacob's-ladder · Polemoniaceae
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  Polygonum amphibium L. Native POAM8

  water knotweed · Polygonaceae
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  Polygonum amphibium L. var. emersum Michx. Native POAME

  longroot smartweed · Polygonaceae
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  Polygonum bistortoides Pursh Native POBI6

  American bistort · Polygonaceae
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  Polygonum douglasii Greene Native PODO4

  Douglas' knotweed · Polygonaceae
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  Polygonum douglasii Greene ssp. spergulariiforme (Meisn. ex Small) J.C. Hickman Native PODOS2

  scatter knotweed · Polygonaceae
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  Polygonum hydropiperoides Michx. Native POHY2

  swamp smartweed · Polygonaceae
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  Polygonum lapathifolium L. Native POLA4

  curlytop knotweed · Polygonaceae
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  Polypodium glycyrrhiza D.C. Eaton Native POGL8

  licorice fern · Polypodiaceae
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  Polystichum munitum (Kaulf.) C. Presl Native POMU

  western swordfern · Dryopteridaceae
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  Populus balsamifera L. Native POBA2

  balsam poplar · Salicaceae
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  Populus balsamifera L. ssp. trichocarpa (Torr. & A. Gray ex Hook.) Brayshaw Native POBAT

  black cottonwood · Salicaceae
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  Potamogeton natans L. Native PONA4

  floating pondweed · Potamogetonaceae
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  Potamogeton pusillus L. Native POPU7

  small pondweed · Potamogetonaceae
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  Potamogeton pusillus L. ssp. pusillus Native POPUP5

  small pondweed · Potamogetonaceae
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  Potentilla glandulosa Lindl. Native POGL9

  sticky cinquefoil · Rosaceae
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  Potentilla gracilis Douglas ex Hook. Native POGR9

  slender cinquefoil · Rosaceae
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  Potentilla gracilis Douglas ex Hook. var. gracilis Native POGRG3

  graceful cinquefoil · Rosaceae
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  Prenanthes alata (Hook.) D. Dietr. Native PRAL

  western rattlesnakeroot · Asteraceae
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  Prosartes hookeri Torr. Native PRHO2

  drops-of-gold · Liliaceae
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  Prosartes hookeri Torr. var. oregana (S. Watson) Kartesz Native PRHOO

  Oregon drops of gold · Liliaceae
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  Prosartes smithii (Hook.) Utech, Shinwari & Kawano Native PRSM

  largeflower fairybells · Liliaceae
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  Prunella vulgaris L. Native PRVU

  common selfheal · Lamiaceae
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  Prunella vulgaris L. ssp. lanceolata (W. Bartram) Hultén Native PRVUL2

  lance selfheal · Lamiaceae
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  Prunus emarginata (Douglas ex Hook.) D. Dietr. Native PREM

  bitter cherry · Rosaceae
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  Prunus emarginata (Douglas ex Hook.) D. Dietr. var. mollis (Douglas ex Hook.) W.H. Brewer Native PREMM

  bitter cherry · Rosaceae
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  Prunus subcordata Benth. Native PRSU2

  Klamath plum · Rosaceae
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  Prunus virginiana L. Native PRVI

  chokecherry · Rosaceae
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  Prunus virginiana L. var. demissa (Nutt.) Torr. Native PRVID

  western chokecherry · Rosaceae
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  Pseudotsuga menziesii (Mirb.) Franco Native PSME

  Douglas-fir · Pinaceae
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  Pseudotsuga menziesii (Mirb.) Franco var. menziesii Native PSMEM

  Douglas-fir · Pinaceae
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  Psilocarphus elatior (A. Gray) A. Gray Native PSEL

  meadow woollyheads · Asteraceae
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  Pteridium aquilinum (L.) Kuhn Native PTAQ

  western brackenfern · Dennstaedtiaceae