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PLEASE NOTE:
"Poisonous" does not mean deadly. Some manifestations of toxicity are subtle. The dose, as always, determines if a plant is safe source of nutrients or a toxic hazard.

List of Scientific and Common Name Equivalents

A. muscaria:  Fly Agaric
A. pantherina:  Panther
A. verna:  Destroying Angels
Abrus precatorius:  Rosary Pea
Acer rubrum:  Red maple, Swamp maple, Soft maple
Acer saccharinum:  Silver maple, Soft maple, White maple
Acer saccharum:  Sugar maple, Rock maple, Hard maple
Aconitum spp.:  Monkshood, Aconite, Wolfsbane
Actaea spp.:  Baneberry, Dolls Eyes, White Cohosh, Snakeberry
Aesculus spp.:  Horse Chestnut, Buckeye
Agrostemma githago:  Corn Cockle
Aleurites fordii:  Tung Oil Tree
Allium spp.:  Commercial Onions, Wild Onions, Swamp Onions, Chives
Amanita spp.:  Monkey Agaric, Panther Cap, Death Cap, Death Angel
Amaranthus spp.:  Pigweed
Amsinckia intermedia:  Fiddleneck
Apocynum spp.:  Dogbane
Argemone mexicana:  Prickly Poppy, Mexican Poppy
Arisaema spp.:  Jack in the Pulpit
Asclepias spp.:  Milkweed
Astragalus and Oxytropis spp.:  Locoweed
Atropa belladonna:  Belladonna, Deadly Nightshade
Brassica spp, :  Rape, Cabbage, Turnips, Broccoli, Mustard
Caltha palustris:  Marsh Marigold, Cowslip
Cannabis sativa:  Marijuana
Centaurea solstitialis:  Yellow Star Thistle
Chelidonium majus:  Celandine
Chenopodium album:  Lambs Quarters
Cicuta spp.:  Water Hemlock, Cowbane
Claviceps spp.:  Ergot
Conium maculatum:  Poison Hemlock
Convallaria majalis:  Lily of the Valley
Coronilla varia:  Crown Vetch
Daphne spp.:  Daphne
Datura spp.:  Jimsonweed, Downy Thornapple, Devils Trumpet, Angels Trumpet
Delphinium spp.:  Delphiniums, Larkspurs
Dicentra spp.:  Bleeding Heart, Squirrel Corn, Dutchmans Breeches
Digitalis purpurea:  Foxglove
Equisetum arvense and other spp.:  Horsetail
Eupatorium rugosum:  White Snakeroot
Euphorbia spp.:  Poinsettia, Spurges, Snow on the Mountain
Fagoypyrum esculentum:  Buckwheat
Festuca arundinacea:  Tall Fescue
Gelsemium sempervirens:  Jessamine
Glechoma spp.:  Ground Ivy, Creeping Charlie, Gill over the ground
Halogeton glomeratus:  Halogeton
Helleborus niger:  Christmas Rose
Hyoscyanamus niger:  Henbane
Hypericum perforatum:  St. Johns Wort, Klamath Weed
Iris spp.:  Irises
Laburnum anagyroides:  Golden Chain, Laburnum
Lantana camara:  Lantana, Red Sage, Yellow Sage, West Indian Lantana
Lathyrus spp.:  Sweet Pea, Tangier Pea, Everlasting Pea, Caley Pea, Singletary Pea
Leucothoe axillaris and Leucothoe davisiae:  Drooping Leucothoe, Sierra Laurel
Linum usitatissimum:  Flax
Lobelia spp.:  Great Lobelia, Cardinal Flower, Indian Tobacco
Lotus corniculatus:  Birdsfoot Trefoil
Lupinus spp.:  Lupine
Medicago sativa:  Alfalfa, Lucerne
Menispermum canadense:  Moonseed
Metilotus alba and Melilotus officinalis:  White Sweetclover, Yellow Sweetclover
Nerium oleander:  Oleander
Nicotiana spp.:  Tobacco, Tree Tobacco
Onoclea sensibilis:  Sensitive Fern
Ornithogalum umbellatum:  Star of Bethlehem
Papaver spp.:  Various Poppies including Opium Poppy
Phytolacca americana:  Pokeweed
Pieris japonica and other spp.:  Japanese Pieris, Mountain Fetterbrush
Pinus ponderosa:  Ponderosa Pine
Podophyllum peltatum:  Mayapple, Mandrake
Prunus spp.:  Wild Cherries, Black Cherry, Bitter Cherry, Choke Cherry, Pin Cherry
Pteridium aquilinium:  Bracken Fern
Quercus spp.:  Oak Trees
Ranunculus spp.:  Buttercup, Crowfoot
Rheum rhaponticum:  Rhubarb
Ricinus communis:  Castor Bean
Robinia pseudoacacia:  Black Locust
Rumex spp.:  Dock
Sambucus canadensis:  Elderberry
Sanquinaria canadensis:  Bloodroot
Saponaria spp.:  Bouncing Bet, Cow Cockle
Senecio spp.:  Senecio, Groundsels, Ragwort
Solanum spp.:  Common Nightshade, Black Nightshade, Horse Nettle, Buffalo Bur, Potato
Sorghum spp.:  Sorghum, Milo, Sudan Grass, Johnson Grass
Symplocarpus foetidus:  Eastern Skunk Cabbage
Taxus cuspidata:  Yew
Tetradymia spp.:  Horsebrush
Toxicodendron diversiloba:  Poison oak
Toxicodendron radicans:  Poison ivy
Toxicodendron vernix:  Poison Sumac
Trifolium spp.:  Alsike Clover, Red Clover, White Clover
Triglochin maritima:  Arrowgrass
Urtica spp.:  Stinging Nettle
Veratrum californicum:  Corn Lily, False Hellbore
Vicia spp.:  Common Vetch, Hairy Vetch, Narrow leafed vetch, purple vetch, broad beans
Wisteria spp.:  Wisteria
Xanthium strumarium:  Cocklebur
Zigadenus spp.:  Death Camas