York County

Showing 1–50 of 1,545.

• 
  Abies balsamea (L.) Mill. Native ABBA

  balsam fir · Pinaceae
• 
  Abutilon theophrasti Medik. Introduced ABTH

  velvetleaf · Malvaceae
• 
  Acalypha rhomboidea Raf. Native ACRH

  common threeseed mercury · Euphorbiaceae
• 
  Acalypha virginica L. Native ACVI

  Virginia threeseed mercury · Euphorbiaceae
• 
  Acer negundo L. Native ACNE2

  boxelder · Aceraceae
• 
  Acer pensylvanicum L. Native ACPE

  striped maple · Aceraceae
• 
  Acer rubrum L. Native ACRU

  red maple · Aceraceae
• 
  Acer saccharinum L. Native ACSA2

  silver maple · Aceraceae
• 
  Acer saccharum Marshall Native ACSA3

  sugar maple · Aceraceae
• 
  Acer saccharum Marshall var. saccharum Native ACSAS

  sugar maple · Aceraceae
• 
  Acer spicatum Lam. Native ACSP2

  mountain maple · Aceraceae
• 
  Achillea millefolium L. Both ACMI2

  common yarrow · Asteraceae
• 
  Achillea ptarmica L. Introduced ACPT

  sneezeweed · Asteraceae
• 
  Acorus calamus L. Introduced ACCA4

  calamus · Acoraceae
• 
  Actaea pachypoda Elliott Native ACPA

  white baneberry · Ranunculaceae
• 
  Actaea racemosa L. Native ACRA7

  black baneberry · Ranunculaceae
• 
  Actaea racemosa L. var. racemosa Native ACRAR

  black bugbane · Ranunculaceae
• 
  Adiantum pedatum L. Native ADPE

  northern maidenhair · Pteridaceae
• 
  Aegopodium podagraria L. Introduced AEPO

  bishop's goutweed · Apiaceae
• 
  Agalinis maritima (Raf.) Raf. Native AGMA3

  saltmarsh false foxglove · Scrophulariaceae
• 
  Agalinis maritima (Raf.) Raf. var. maritima Native AGMAM

  saltmarsh false foxglove · Scrophulariaceae
• ⚘
  Agalinis paupercula (A. Gray) Britton Native AGPA12

  smallflower false foxglove · Scrophulariaceae
• ⚘
  Agalinis paupercula (A. Gray) Britton var. borealis Pennell Native AGPAB

  smallflower false foxglove · Scrophulariaceae
• 
  Agalinis tenuifolia (Vahl) Raf. Native AGTE3

  slenderleaf false foxglove · Scrophulariaceae
• 
  Agalinis tenuifolia (Vahl) Raf. var. tenuifolia Native AGTET

  slenderleaf false foxglove · Scrophulariaceae
• 
  Agrimonia gryposepala Wallr. Native AGGR2

  tall hairy agrimony · Rosaceae
• 
  Agrimonia striata Michx. Native AGST

  roadside agrimony · Rosaceae
• 
  Agrostemma githago L. Introduced AGGI

  common corncockle · Caryophyllaceae
• 
  Agrostis capillaris L. Introduced AGCA5

  colonial bentgrass · Poaceae
• 
  Agrostis gigantea Roth Introduced AGGI2

  redtop · Poaceae
• 
  Agrostis perennans (Walter) Tuck. Native AGPE

  upland bentgrass · Poaceae
• 
  Agrostis scabra Willd. Native AGSC5

  rough bentgrass · Poaceae
• 
  Agrostis stolonifera L. Introduced AGST2

  creeping bentgrass · Poaceae
• 
  Ajuga reptans L. Introduced AJRE

  common bugle · Lamiaceae
• 
  Aletris farinosa L. Native ALFA2

  white colicroot · Liliaceae
• 
  Alisma subcordatum Raf. Native ALSU

  American water plantain · Alismataceae
• 
  Alisma triviale Pursh Native ALTR7

  northern water plantain · Alismataceae
• 
  Allium canadense L. Native ALCA3

  meadow garlic · Liliaceae
• 
  Allium canadense L. var. canadense Native ALCAC

  meadow garlic · Liliaceae
• 
  Allium tricoccum Aiton Native ALTR3

  ramp · Liliaceae
• 
  Allium vineale L. Introduced ALVI

  wild garlic · Liliaceae
• 
  Allium vineale L. ssp. vineale Introduced ALVIV

  wild garlic · Liliaceae
• 
  Alnus incana (L.) Moench Native ALIN2

  gray alder · Betulaceae
• 
  Alnus incana (L.) Moench ssp. rugosa (Du Roi) R.T. Clausen Native ALINR

  speckled alder · Betulaceae
• 
  Alnus serrulata (Aiton) Willd. Native ALSE2

  hazel alder · Betulaceae
• 
  Alopecurus pratensis L. Introduced ALPR3

  meadow foxtail · Poaceae
• 
  Amaranthus albus L. Introduced AMAL

  prostrate pigweed · Amaranthaceae
• 
  Amaranthus cannabinus (L.) Sauer Native AMCA2

  tidalmarsh amaranth · Amaranthaceae
• 
  Amaranthus powellii S. Watson Native AMPO2

  Powell's amaranth · Amaranthaceae
• 
  Amaranthus powellii S. Watson ssp. powellii Native AMPOP

  Powell's amaranth · Amaranthaceae