Ingestion of Cannabis sativa by companion animals can result in depression of the central nervous system and incoordination, as well as vomiting, diarrhea, drooling, increased heart rate, and even seizures and coma.

All parts of Cycas Revoluta are poisonous, but the seeds or "nuts" contain the largest amount of toxin. The ingestion of just one or two seeds can result in very serious effects, which include vomiting, diarrhea, depression, seizures and liver failure.

Members of the Lilium spp. are considered to be highly toxic to cats. While the poisonous component has not yet been identified, it is clear that with even ingestions of very small amounts of the plant, severe kidney damage could result.

The bulb portions of Tulipa/Narcissus spp. contain toxins that can cause intense gastrointestinal irritation, drooling, loss of appetite, depression of the central nervous system, convulsions and cardiac abnormalities.

Members of the Rhododenron spp. contain substances known as grayantoxins, which can produce vomiting, drooling, diarrhea, weakness and depression of the central nervous system in animals. Severe azalea poisoning could ultimately lead to coma and death from cardiovascular collapse.

All parts of Nerium oleander are considered to be toxic, as they contain cardiac glycosides that have the potential to cause serious effects - including gastrointestinal tract irritation, abnormal heart function, hypothermia and even death.

The poisonous principle in Ricinus communis is ricin, a highly toxic protein that can produce severe abdominal pain, drooling, vomiting, diarrhea, excessive thirst, weakness and loss of appetite. Severe cases of poisoning can result in dehydration, muscle twitching, tremors, seizures, coma and death.

Cylamen species contain cyclamine, but the highest concentration of this toxic component is typically located in the root portion of the plant. If consumed, Cylamen can produce significant gastrointestinal irritation, including intense vomiting. Fatalities have also been reported in some cases.

This plant contains components that can produce gastrointestinal irritation, as well as those that are toxic to the heart, and can seriously affect cardiac rhythm and rate.

Taxus spp. contains a toxic component known as taxine, which causes central nervous system effects such as trembling, incoordination, and difficulty breathing. It can also cause significant gastrointestinal irritation and cardiac failure, which can result in death.

This is as complete a list as we've been able to find about the plants that are poisonous to all of the animals in your household:

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A B C D E F G H I J K L M N O P Q R S T U V W Y

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A

Acokanthera fruit and flowers
Aconite
African rue
Agapanthus
Agave - leaves
Aloe
Alsike clover
Amanita
Amaryllis - bulbs
Amaryllis belladonna - bulbs
Anemone
Angel trumpet tree - flowers, leaves, seeds
Anthurium
Apple - seeds
Apple leave croton
Apricot pits
Arrowgrass
Arrowhead vine
Asparagus fern
Atropa belladonna - black berries very dangerous, whole plant poisonous
Autumn crocus - corms
Avocado
Azalea

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B

Baccharis
Balsam
Balsam pear - seed, rind of fruit
Baneberry - berries, roots, foliage
Beach pea
Beargrass
Beefsteak plant
Begonia
Belladonna lily - bulbs
Betel nut palm
Bird of paradise
Bittersweet - berries
Bitterweed(s)
Black locust - bark, sprouts, foliage
Black nightshade - leaves and berries
Black root
Bladderpod
Bleeding heart - foliage and roots
Bloodroot
Bluebonnet
Blue cohosh
Blue-green algae
Bog kalmia
Boston ivy
Bottlebrush - flowers
Boxwood
Bracken fern
Branching ivy
Broomcorn
Broomweed
Buckeye - sprouts and nuts
Buckthorn - fruit and bark
Bull nettle
Bunchberry
Burroweed
Buttercup - leaves (only poisonous in 2-3% of bunnies)
Black locust seeds
Boxwood - leaves and twigs
Buckeye - seeds
Buckthorn - berries

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C

Cactus thorn
Caesalpinia - seeds and pods
Caladium
Calico bush - young leaves and shoots
California fern
California geranium
California holly - leaves
Calla
Candelabra cactus
Cardinal flower
Carnation
Carolina jessamine
Casava - roots and sap
Cassine - berries
Castor bean - seed
Century plant
Ceriman
Chalice vine
Cherries, wild and cultivated - twigs, foliage, bark, pits
Cherry, Jerusalem - fruits and leaves
Cherry laurel
Cherry, natal - berries
Chinaberry tree - berries
Chokecherry - leaves
Christmas berry - leaves
Christmas candle - sap
Christmas rose
Cineraria
Clematis
Cloak fern
Cocklebur
Coffee bean
Cohosh
Colorado rubberweed
Columbine
Common privet
Cone flower
Coral berry - seeds
Coral plant - seeds
Cordatum
Corn cockle
Corn lily
Corn plant
Cotoneaster
Covotillo - berries
Cowslip
Crab's eye - seeds
Creeping Charlie (not the houseplant)
Cress/crucifers/mustard
Crocus - corms
Croton
Crown of thorns
Crown vetch
Crow poison
Cuban laurel
Cuckoopint
Curcas bean - seeds and oil
Cutleaf philodendron
Cycads
Cyclamen

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D

Daffodil
Daisy
Daphne
Delphinium
Datura
Deadly amanita
Deadly nightshade
Death camas
Death cup
Desert tobacco
Destroying angel
Devils ivy
Devils ivy
Devils tomato
Dianthus
Dieffenbachina
Dogbane - leaves
Dogwood - fruit
Doll's eyes - berries roots, foliage
Dracaena palm
Dragon tree
Drymary
Dumbcane
Durra
Dutchman's breeches - foliage and roots
Dutchman's pipe

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E

Elaine
Eggplant - plant
Elderberry - unripe berries
Elephant ear
Emerald duke
Emerald feather
English ivy
English laurel
Euonymus
Euphorbia - leaves, flowers, sap
Evening trumpet
Exotica perfection
Eyebane

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F

False henbane
False hellebore
False parsley
Fiddle-leaf fig
Fiddleneck - fruit and bark
Firecracker
Firethorn
Fireweed - fruit and bark
Florida beauty
Flowering beauty
Flowering tobacco
Fluffy ruffles
Fly agaric
Fly-poison
Fool's parsley
Four 0'clock
Foxglove
Frijolito
Fruit salad plant

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G

Garden sorrel
Gelsemium
German ivy
Ghostweed
Giant dumbcane
Glacier ivy
Gladiola
Glecoma hederacea
Glory ivy
Goatweed
Gold dieffenbachia
Gold dust dracaena
Goldenchain tree - seeds and pods
Golden pothos
Golden-toothed aloe
Greasewood
Green-gold nephythytis
Ground ivy
Groundsel(s)
Guajillo

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H

Halogeton
Hawaiian baby wood rose
Heart ivy
Heartleaf
Heavenly bamboo
Hedge apples
Hellebore
Hemlock
Hemp, Indian - leaves
Henbane, black
Hogwort
Holly - berries
Horsechestnut - nuts
Hyacinth
Hydrangea

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I

Impatiens
Indian laurel
Indian rubber plant
Indian tobacco
Indian turnip
Indigo
Inkberry - leaves and berries
Inkweed
Iris
Ivy

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J

Jack in the pulpit
Jamestown weed
Jatropha - seed and oil
Java bean - uncooked bean
Jequirity bean - seeds
Jerusalem cherry
Jessamine - flowers, leaves, berries
Jessamine, night blooming
Jimmy fern
Jimson weed
Johnson grass
Jonquil
Juniper - needles, stem and berries

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K

Kafir
Klamath weed

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L

Lady slipper
Lambkill - leaves
Lantana
Larkspur
Lecheguilla
Ligustrum
Lily of the valley
Lima bean - uncooked bean
Lobelia
Locoweed
Lords and ladies
Lupine

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M

Machineel
Madagascar dragon tree
Majesty
Mandrake
Marble queen
Marijuana
March marigold
Mayapple
Medicine plant
Mescal - cactus tops
Mescal bean
Mesquite
Mexican breadfruit
Mexicantes
Milkvetch
Milkweed
Milo
Miniature croton
Mistletoe
Moccasin flower
Mock orange
Monkshood
Moonseed
Morning glory - seed
Mother-in-law
Mountain laurel - young leaves and shoots
Mushroom
Mustard - root

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N

Narcissus
Nephthytis
Needlepoint ivy
Nicotiana
Nightshade(s)

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O

Oaks - foliage and acorns
Oleander
Orange milkweed
Orange sneezeweed
Ornamental tobacco
Oxalis

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P

Palma Christi - seeds and leaves
Panda
Paper flowers
Paradise plant
Parlor ivy
Parsnip
Partridge breast
Peach - pith contains cyanide
Pear - seeds contains cyanide
Pear, balsam - seed and outer rind of fruit
Pencilbush
Pencil cactus
Pennyroyal mint
Peony
Peregrina - seeds and oil
Perill mint
Periwinkle - whole plant
Peyote - cactus tops
Philodendron
Pigweed
Pingue
Pinks
Plum - pits
Plumose fern
Poinciana - green seeds and pods
Poinsettia - leaves, sap, flowers
Poison hemlock
Poison ivy
Poison nut
Poison oak
Poison parsnip
Poison sumac
Pokeberry - root
Pokeroot - root
Poke salad - root
Pokeweed - root
Poppy (except California)
Pot marigold
Pot mum
Potato - green, leaves/eye
Pathos
Precatory bean - seeds
Prickly copperweed
Prickly poppy
Primrose
Primula
Privet - berries
Purge nut - seed and oil
Purple sesbane
Psychic nut - seeds and oil
Pyracantha

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Q

Queen Anne's lace

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R

Ranunculus
Rattlebox
Rattleweed
Rayless goldenrod
Red clover
Red emerald
Red margined dracaena
Red princess
Red sage - green berries are fatal
Rhododendron
Rhubarb
Ribbon plant
Ripple ivy
Rosary bean - seeds
Rosary pea
Rum cherry - withered leaves

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S

Sacahuista
Saddle leaf philodendron
Sage - leaves of some are poisonous
Sago palm
Sand begonia
Satin pothos
Schefflera
Scotch broom - seeds
Senecio
Senna bean
Sesbane(s)
Shamrock plant
Sheep laurel - leaves
Silverleaf
Silverling
Silver pothos
Skunk cabbage
Slinkweed
Snapdragon
Snapweed
Snowdrop
Snow on the mountain
Solanum - berries
Solomon's seal
Sorghum
Snake palm
Snakeroot, white
Snakeweed
Spathe flower
Spider mum
Split leaf philodendron
Spotted dumb cane
Sprengeri fern
Spurge - leaves and flowers
Squill
Squirrel corn
Staggergrass
Star of Bethlehem
Stinkweed
St johnswort
Stranomium
String of beads/pearls
Striped dracaena
Sudan grass
Swamp laurel
Sweet pea - seeds
Sweet potato
Sweet William
Sweet heart ivy
Swiss cheese plant
Skunk cabbage

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T

Tansy
Taro
Taro vine
Thorn apply
Tiger lily
Toadstools
Tobacco
Touch me not
Toyon - leaves
Tree philodendron
Tropic snow
True aloe
Trumpet plant
Trumpet vine
Tullidora - berries
Tulip
Turpentine weed

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U

Umbrella plant

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V

Variegated philodendron
Venus flytrap
Victoria regia
Violet - seeds
Virginia creeper - berries

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W

Warneckei dracaena
Water hemlock
White snakeroot
Wild black berry - withered leaves
Wild carrot, cucumber, jasmine, parsnip, pea
Windflower
Wisteria - seeds and pods
Wolfsbane
Woodbine - sap
Woodrose
Woody nightshade - berries

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Y

Yam bean - roots and immature pods
Yaupon holly - berries
Yellow knapweed
Yellow jasmine
Yellow oleander
Yellow star thistle
Yerba depasmo
Yew berries

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