Weed Species Organized by Family

Amaranthaceae

• Amaranthus retroflexus (Redroot pigweed)

Apiaceae

• Conium maculatum (Poison hemlock)
  
• Daucus carota (Wild carrot)
• Heracleum lanatum (Cow parsnip)
  

Asteraceae

• Achillea millefolium (Yarrow)
• Anthemis cotula (Mayweed chamomile)
• Bellis perennis (English daisy)
• Cichorium intybus (Chicory)
• Cirsium arvense (Canada thistle)
• Conyza canadensis (Horseweed)
• Crepis capillaris (Smooth hawksbeard)
• Crepis setosa (Bristly hawksbeard)
• Lactuca serriola (Prickly lettuce)
• Lapsana communis (Nipplewort)
• Madia sativa (Tarweed)
  
• Matricaria matricariodes (Pineapple weed)
• Senecio jacobaea (Tansy ragwort)
• Senecio sylvaticus (Woodland groundsel)
• Senecio vulgaris (Common grounsel)
• Sonchus asper (Prickly sowthistle)
• Sonchus oleraceae (Annual sowthistle)
• Tanacetum vulgare (Tansy)
• Taraxacum officinale (Dandelion)
• Tragopogon dubius (Western salsify)
• Senecio sylvaticus (Woodland groundsel)
  

Boraginaceae

• Myosotis discolor (Blue and yellow forget me not)

Brassicaceae

• Arabidopsis thaliana (Mouse-ear cress)
  
• Brassica kaber  (Wild mustard)
• Brassica rapa (Birdsrape mustard)
• Capsella bursa-pastoris (Shepherd's-purse)
• Cardamine hirsuta and C. oligosperma (Bittercress)
• Draba verna (Whitlow-grass)
  

Caryophyllaceae

• Cerastium arvense (Field chickweed)
• Cerastium vulgatum (Mouseear chickweed)
• Sagina procumbens (Pearlwort)
  
• Spergula arvensis (Corn spurry)
• Spergularia rubra (Red sandspurry)
  
• Stellaria media (Common chickweed)

Chenopodicaceae

• Chenopodium album (Common lambsquarter)

Convolvulaceae

• Calystegia sepium (Hedge bindweed)
• Convolvulus arvensis (Field bindweed)

Cyperaceae

• Cyperus esculentus (Yellow nutsedge)

Dipsacaceae

• Dipsacus sylvestris (Common teasel)

Equisetaceae

• Equisetum arvense (Horsetail)

Euphorbiaceae

• Chamaesyce prostrata (Prostrate spurge)

Geraniaceae

• Erodium cicutarium (Redstem filaree)
  
• Geranium molle (Wild geranium)
• Geranium robertianum (Herb-Robert geranium)
  

Hypericaceae

• Hypericum perforatum (St. John's wort)

Lamiaceae

• Lamium amplexicaule (Henbit)
• Lamium purpureum (Dead nettle)

Malvaceae

• Abutilon threophrasti (Velvetleaf)

Onagraceae

• Epilobium angustifolium (Fireweed)
• Epilobium ciliatum (Northern willowherb)
  

Oxalidaceae

• Oxalis stricta or O. corniculata (Woodsorrel)

Plantaginaceae

• Plantago lanceolata (Buckhorn plantain)
• Plantago major (Broadleaf plantain)

Polygonaceae

• Polygonum aviculare (Prostrate knotweed)
• Polygonum convolvulus (Wild buckwheat)
• Polygonum persicaria (Ladysthumb)
  
• Rumex acetosella (Red sorrel)
• Rumex crispus (Curly dock)
  
• Rumex obtusifolius (Broadleaf dock)

Portulacaceae

• Calandrinia ciliata (Redmaids)
• Claytonia perfoliata (syn. Montia perfoliata, Miner's lettuce)
• Montia linearis (Narrow-leaved Montia)
• Portulaca oleraceae (Common purslane)
  

Primulaceae

• Anagallis arvensis (Scarlet pimpernel)

Scrophulariaceae

• Kickxia elatine (Sharppoint fluvellin)
  
• Veronica hederaefolia (Ivy leaf speedwell)
• Veronica persica  (Persian speedwell)

Solanaceae

• Datura stramonium (Jimson weed)
• Solanum dulcamara (Bittersweet nightshade)
• Solanum nigrum (Black nightshade)
• Solanum sarrachoides (Hairy nightshade)

Urticaceae

• Urtica dioica (Stinging nettle)