Elk County

Showing 451–500 of 767.

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  Oenothera curtiflora W.L. Wagner & Hoch Native OECU2

  velvetweed · Onagraceae
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  Oenothera filiformis (Small) W.L. Wagner & Hoch Native OEFI2

  longflower beeblossom · Onagraceae
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  Oenothera macrocarpa Nutt. Native OEMA

  bigfruit evening primrose · Onagraceae
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  Oenothera macrocarpa Nutt. ssp. macrocarpa Native OEMAM

  bigfruit evening primrose · Onagraceae
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  Oenothera speciosa Nutt. Native OESP2

  pinkladies · Onagraceae
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  Oenothera triloba Nutt. Native OETR2

  stemless evening primrose · Onagraceae
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  Oenothera villosa Thunb. Native OEVI

  hairy evening primrose · Onagraceae
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  Oenothera villosa Thunb. ssp. villosa Native OEVIV

  hairy evening primrose · Onagraceae
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  Oligoneuron rigidum (L.) Small Native OLRI

  stiff goldenrod · Asteraceae
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  Oligoneuron rigidum (L.) Small var. rigidum Native OLRIR

  stiff goldenrod · Asteraceae
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  Onosmodium bejariense DC. ex A. DC. Native ONBE

  soft-hair marbleseed · Boraginaceae
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  Onosmodium bejariense DC. ex A. DC. var. occidentale (Mack.) B.L. Turner Native ONBEO

  western marbleseed · Boraginaceae
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  Ophioglossum engelmannii Prantl Native OPEN

  limestone adderstongue · Ophioglossaceae
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  Opuntia macrorhiza Engelm. Native OPMA2

  twistspine pricklypear · Cactaceae
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  Opuntia macrorhiza Engelm. var. macrorhiza Native OPMAM3

  twistspine pricklypear · Cactaceae
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  Osmorhiza longistylis (Torr.) DC. Native OSLO

  longstyle sweetroot · Apiaceae
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  Oxalis dillenii Jacq. Native OXDI2

  slender yellow woodsorrel · Oxalidaceae
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  Oxalis stricta L. Native OXST

  common yellow oxalis · Oxalidaceae
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  Oxalis violacea L. Native OXVI

  violet woodsorrel · Oxalidaceae
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  Packera plattensis (Nutt.) W.A. Weber & Á. Löve Native PAPL12

  prairie groundsel · Asteraceae
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  Panicum capillare L. Native PACA6

  witchgrass · Poaceae
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  Panicum dichotomiflorum Michx. Native PADI

  fall panicgrass · Poaceae
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  Panicum dichotomiflorum Michx. var. dichotomiflorum Native PADID

  fall panicgrass · Poaceae
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  Panicum virgatum L. Native PAVI2

  switchgrass · Poaceae
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  Panicum virgatum L. var. virgatum Native PAVIV

  switchgrass · Poaceae
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  Parietaria pensylvanica Muhl. ex Willd. Native PAPE5

  Pennsylvania pellitory · Urticaceae
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  Paronychia fastigiata (Raf.) Fernald Native PAFA3

  hairy forked nailwort · Caryophyllaceae
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  Paronychia fastigiata (Raf.) Fernald var. fastigiata Native PAFAF

  hairy forked nailwort · Caryophyllaceae
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  Parthenium hispidum Raf. Native PAHI8

  wild quinine · Asteraceae
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  Parthenocissus quinquefolia (L.) Planch. Native PAQU2

  Virginia creeper · Vitaceae
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  Pascopyrum smithii (Rydb.) Á. Löve Native PASM

  western wheatgrass · Poaceae
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  Paspalum pubiflorum Rupr. ex Fourn. Native PAPU5

  hairyseed paspalum · Poaceae
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  Paspalum setaceum Michx. Native PASE5

  thin paspalum · Poaceae
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  Pediomelum argophyllum (Pursh) J. Grimes Native PEAR6

  silverleaf Indian breadroot · Fabaceae
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  Pediomelum esculentum (Pursh) Rydb. Native PEES

  large Indian breadroot · Fabaceae
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  Pellaea atropurpurea (L.) Link Native PEAT2

  purple cliffbrake · Pteridaceae
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  Pennisetum glaucum (L.) R. Br. Introduced PEGL2

  pearl millet · Poaceae
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  Penstemon cobaea Nutt. Native PECO4

  cobaea beardtongue · Scrophulariaceae
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  Penstemon tubaeflorus Nutt. Native PETU

  white wand beardtongue · Scrophulariaceae
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  Penstemon tubaeflorus Nutt. var. tubaeflorus Native PETUT

  white wand beardtongue · Scrophulariaceae
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  Penthorum sedoides L. Native PESE6

  ditch stonecrop · Crassulaceae
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  Phleum pratense L. Introduced PHPR3

  timothy · Poaceae
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  Phlox divaricata L. Native PHDI5

  wild blue phlox · Polemoniaceae
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  Phlox divaricata L. ssp. laphamii (Alph. Wood) Wherry Native PHDIL6

  Lapham's phlox · Polemoniaceae
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  Phlox oklahomensis Wherry Native PHOK

  Oklahoma phlox · Polemoniaceae
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  Phlox pilosa L. Native PHPI

  downy phlox · Polemoniaceae
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  Phlox pilosa L. ssp. pilosa Native PHPIP2

  downy phlox · Polemoniaceae
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  Phryma leptostachya L. Native PHLE5

  American lopseed · Verbenaceae
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  Phyla lanceolata (Michx.) Greene Native PHLA3

  lanceleaf fogfruit · Verbenaceae
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  Physalis angulata L. Native PHAN5

  cutleaf groundcherry · Solanaceae