Prince William County

Showing 1–50 of 1,225.

• 
  Abutilon theophrasti Medik. Introduced ABTH

  velvetleaf · Malvaceae
• 
  Acalypha gracilens A. Gray Native ACGR2

  slender threeseed mercury · Euphorbiaceae
• 
  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 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
• 
  Achillea millefolium L. Both ACMI2

  common yarrow · Asteraceae
• 
  Achillea millefolium L. var. occidentalis DC. Native ACMIO

  western yarrow · Asteraceae
• 
  Acorus calamus L. Introduced ACCA4

  calamus · Acoraceae
• 
  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
• 
  Agalinis purpurea (L.) Pennell Native AGPU5

  purple 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
• 
  Agastache nepetoides (L.) Kuntze Native AGNE2

  yellow giant hyssop · Lamiaceae
• 
  Ageratina altissima (L.) R.M. King & H. Rob. Native AGAL5

  white snakeroot · Asteraceae
• 
  Ageratina aromatica (L.) Spach Native AGAR4

  lesser snakeroot · Asteraceae
• 
  Agrimonia gryposepala Wallr. Native AGGR2

  tall hairy agrimony · Rosaceae
• 
  Agrimonia microcarpa Wallr. Native AGMI2

  smallfruit agrimony · Rosaceae
• 
  Agrimonia parviflora Aiton Native AGPA6

  harvestlice · Rosaceae
• 
  Agrimonia pubescens Wallr. Native AGPU

  soft agrimony · Rosaceae
• 
  Agrimonia rostellata Wallr. Native AGRO3

  beaked agrimony · Rosaceae
• 
  Agrostemma githago L. Introduced AGGI

  common corncockle · Caryophyllaceae
• 
  Agrostis gigantea Roth Introduced AGGI2

  redtop · Poaceae
• 
  Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. Native AGHY

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

  upland bentgrass · Poaceae
• 
  Ailanthus altissima (Mill.) Swingle Introduced AIAL

  tree of heaven · Simaroubaceae
• 
  Aira elegans Willd. ex Kunth Introduced AIEL4

  annual silver hairgrass · Poaceae
• 
  Albizia julibrissin Durazz. Introduced ALJU

  silktree · Fabaceae
• 
  Aletris farinosa L. Native ALFA2

  white colicroot · Liliaceae
• 
  Alisma subcordatum Raf. Native ALSU

  American water plantain · Alismataceae
• 
  Alliaria petiolata (M. Bieb.) Cavara & Grande Introduced ALPE4

  garlic mustard · Brassicaceae
• 
  Allium canadense L. Native ALCA3

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

  meadow garlic · Liliaceae
• 
  Allium vineale L. Introduced ALVI

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

  wild garlic · Liliaceae
• 
  Alnus serrulata (Aiton) Willd. Native ALSE2

  hazel alder · Betulaceae
• 
  Alyssum alyssoides (L.) L. Introduced ALAL3

  pale madwort · Brassicaceae
• 
  Amaranthus albus L. Introduced AMAL

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

  tidalmarsh amaranth · Amaranthaceae
• 
  Amaranthus hybridus L. Native AMHY

  slim amaranth · Amaranthaceae
• 
  Amaranthus spinosus L. Native AMSP

  spiny amaranth · Amaranthaceae
• 
  Ambrosia artemisiifolia L. Both AMAR2

  annual ragweed · Asteraceae
• 
  Ambrosia trifida L. Native AMTR

  great ragweed · Asteraceae
• 
  Ambrosia trifida L. var. trifida Native AMTRT2

  great ragweed · Asteraceae
• 
  Amelanchier arborea (Michx. f.) Fernald Native AMAR3

  common serviceberry · Rosaceae