York County

Showing 1,051–1,100 of 1,545.

• 
  Polystichum acrostichoides (Michx.) Schott var. acrostichoides Native POACA

  Christmas fern · Dryopteridaceae
• 
  Pontederia cordata L. Native POCO14

  pickerelweed · Pontederiaceae
• 
  Populus alba L. Introduced POAL7

  white poplar · Salicaceae
• 
  Populus grandidentata Michx. Native POGR4

  bigtooth aspen · Salicaceae
• 
  Populus tremuloides Michx. Native POTR5

  quaking aspen · Salicaceae
• ⚘
  Populus ×jackii Sarg. [balsamifera × deltoides] Native POJA2

  balm-of-Gilead · Salicaceae
• 
  Portulaca oleracea L. Both POOL

  little hogweed · Portulacaceae
• 
  Potamogeton amplifolius Tuck. Native POAM5

  largeleaf pondweed · Potamogetonaceae
• 
  Potamogeton bicupulatus Fernald Native POBI9

  snailseed pondweed · Potamogetonaceae
• 
  Potamogeton confervoides Rchb. Native POCO12

  Tuckerman's pondweed · Potamogetonaceae
• 
  Potamogeton crispus L. Introduced POCR3

  curly pondweed · Potamogetonaceae
• 
  Potamogeton epihydrus Raf. Native POEP2

  ribbonleaf pondweed · Potamogetonaceae
• 
  Potamogeton gramineus L. Native POGR8

  variableleaf pondweed · Potamogetonaceae
• 
  Potamogeton natans L. Native PONA4

  floating pondweed · Potamogetonaceae
• 
  Potamogeton nodosus Poir. Native PONO2

  longleaf pondweed · Potamogetonaceae
• 
  Potamogeton oakesianus J.W. Robbins Native POOA

  Oakes' pondweed · Potamogetonaceae
• 
  Potamogeton perfoliatus L. Native POPE7

  claspingleaf pondweed · Potamogetonaceae
• 
  Potamogeton pusillus L. Native POPU7

  small pondweed · Potamogetonaceae
• 
  Potamogeton pusillus L. ssp. gemmiparus (J.W. Robbins) Haynes & C.B. Hellquist Native POPUG4

  small pondweed · Potamogetonaceae
• 
  Potamogeton robbinsii Oakes Native PORO2

  Robbins' pondweed · Potamogetonaceae
• 
  Potamogeton spirillus Tuck. Native POSP3

  spiral pondweed · Potamogetonaceae
• 
  Potentilla argentea L. Introduced POAR8

  silver cinquefoil · Rosaceae
• 
  Potentilla argentea L. var. argentea Introduced POARA3

  silver cinquefoil · Rosaceae
• 
  Potentilla arguta Pursh Native POAR7

  tall cinquefoil · Rosaceae
• 
  Potentilla arguta Pursh ssp. arguta Native POARA4

  tall cinquefoil · Rosaceae
• 
  Potentilla canadensis L. Native POCA17

  dwarf cinquefoil · Rosaceae
• 
  Potentilla canadensis L. var. canadensis Native POCAC2

  dwarf cinquefoil · Rosaceae
• 
  Potentilla norvegica L. Native PONO3

  Norwegian cinquefoil · Rosaceae
• 
  Potentilla norvegica L. ssp. monspeliensis (L.) Asch. & Graebn. Native PONOM

  Norwegian cinquefoil · Rosaceae
• 
  Potentilla pensylvanica L. Native POPE8

  Pennsylvania cinquefoil · Rosaceae
• 
  Potentilla pensylvanica L. var. litoralis (Rydb.) B. Boivin Native POPEL

  Pennsylvania cinquefoil · Rosaceae
• 
  Potentilla recta L. Introduced PORE5

  sulphur cinquefoil · Rosaceae
• 
  Potentilla simplex Michx. Native POSI2

  common cinquefoil · Rosaceae
• 
  Prenanthes altissima L. Native PRAL3

  tall rattlesnakeroot · Asteraceae
• 
  Prenanthes trifoliolata (Cass.) Fernald Native PRTR

  gall of the earth · Asteraceae
• 
  Proserpinaca palustris L. Native PRPA3

  marsh mermaidweed · Haloragaceae
• 
  Proserpinaca palustris L. var. crebra Fernald & Grisc. Native PRPAC

  marsh mermaidweed · Haloragaceae
• 
  Prunella vulgaris L. Native PRVU

  common selfheal · Lamiaceae
• 
  Prunus cerasus L. Introduced PRCE

  sour cherry · Rosaceae
• 
  Prunus maritima Marshall Native PRMA2

  beach plum · Rosaceae
• 
  Prunus maritima Marshall var. maritima Native PRMAM

  beach plum · Rosaceae
• 
  Prunus nigra Aiton Native PRNI

  Canadian plum · Rosaceae
• 
  Prunus pensylvanica L. f. Native PRPE2

  pin cherry · Rosaceae
• 
  Prunus pensylvanica L. f. var. pensylvanica Native PRPEP

  pin cherry · Rosaceae
• 
  Prunus pumila L. Native PRPU3

  sandcherry · Rosaceae
• 
  Prunus serotina Ehrh. Native PRSE2

  black cherry · Rosaceae
• 
  Prunus serotina Ehrh. var. serotina Native PRSES

  black cherry · Rosaceae
• 
  Prunus susquehanae hort. ex Willd. Native PRSU3

  Sesquehana sandcherry · Rosaceae
• 
  Prunus virginiana L. Native PRVI

  chokecherry · Rosaceae
• 
  Prunus virginiana L. var. virginiana Native PRVIV

  chokecherry · Rosaceae