Plants Poisonous to your Cats, Dogs & Horses

Wow….  I had no idea that there were so many plants were poisonous to our familial pets - or at least the ones that are listed as the top three pets around the world: cats, dogs, and horses.  There are 415 plants that are poisonous to dogs (man's best friend); 422 plants that are poisonous to cats (woman's best friend); and 350 plants that are poisonous to horses, ponies, mules and any type of equine (our friends, companions, co-competitors, and working partners).
   If you believe your cat, dog, or equine friend or companion has eaten a poisonous plant, there are two free Help Hotlines available 24 hours per day:  1-800-213-6680  and  1-888-426-4435.

  I am listing below, the plants that are poisonous to our three main groups of animal friends. There are many plants that are poisonous to two or three of our favorite animals.

If the plant is poisonous to all three types of animals, it is listed in this font.

If the plant is poisonous to dogs and cats, it is listed in this font.

If the plant is poisonous to cats only, it is in this font. 

If the plant is poisonous to dogs only, it is underlined in this font.

If the plant is poisonous to horses only it is in this font.

Generally, all types of amaryllis, azaleas, ivy, lily, rhododendrons and yew

are poisonous all types of pets.

Here is an alphabetical listing of the plants that are poisonous to our cats, dogs, and equines -

Adam-and-Eve
African Wonder tree
Alocasia
Aloe (aloe vera)
Alsike clover
Amaryllis
Ambrosia Mexicana
American Bittersweet
American Holly
American Mandrake
American Yew
Andromeda Japonica
Angelica Tree
Apple tree (crabapple tree, also)
Apricot tree
Arrow-Head vine
Arum
Arum lily
Asian lily
Asparagus fern
Australian ivy palm tree
Australian nut
Autumn crocus
Avocados
Azaleas
Baby Doll Ti plant
Barbados Aloe
Barbados lily
Barbados Pride
Barbados Pride 2
Barnaby's Thistle
Bay laurel tree
Bead tree
Begonia
Bergamot Orange tree
Bird of paradise plant
Bird of paradise 2 plant
Bird of paradise flower
Bird's tongue flower
Bishop's weed
Bitter root
Black calla lily
Black cherry tree
Black Indian mustard
Black laurel
Black nightshade
Black walnut tree (NOT cats)
Bobbins
Bog laurel
Borage
Boxwood
Bracken fern
Brake fern
Branching ivy
Brazilwood
Bread and butter plant
Brunfelsia
Buckeye
Buckwheat
Buddhist pine
Bull pine
Burning bush
Buttercup
Butterfly iris
Caladium
Calamondin Orange
California ivy
Calla lily
Caraway plant and seeds
Cardboard cycad or palm
Cardinal flower
Carnations
Carolina maple
Castor bean plant
Catsear
Ceriman
Chamomile
Chandelier plant
Charlock
Charming diffienbachia
Cherry tree
Chinaberry
Chinese evergreen
Chinese jade plant
Chives
Choke cherry tree
Christmas rose
Chrysanthemum
Clematis
Climbing bittersweet
Climbing lily
Climbing nightshade
Clivia lily
Coffee tree
Coleus
Common privet bush
Coontie palm
Cordatum
Corn plant
Cornstalk plant
Cow parsnips
Cowbane
Cuckoo-pint plant
Cutleaf philodendron
Cycads
Cyclamen
Daffodils
Dahlias
Daisy
Day lilies
Deadly nightshade
Desert azalea
Desert rose
Devil's backbone
Devil's ivy
Diffienbachia
Dock
Dog daisy
Dog hobble
Dogbane
Dogbane hemp
Dracaena
Dumbcane
Dwarf Poinciana
Easter lily
Easter rose
Eastern star
Elephant ears
Elephant ear begonia
Elephant ear caladium
Emerald feather
English holly
English ivy
English yew
Epazote
Eucalyptus
European bittersweet
European holly
Everlasting pea plant
Exotica plant
False bittersweet
False Queen Anne's lace
Feather geranium
Fern palm
Fetter bush
Fiddle leaf
Fiddleneck plant
Field horsetail
Field pennycress
Fig tree
Figwort
Fire lily
Flag
Flamingo flower
Fleabane
Florida beauty
Florist's calla lily
Foxglove
Franciscan Rain tree
Garden calla lily
Garden chamomile
Garden hyacinth
Gardenia
Garlic
Geraniums
Geranium-leaf aralia
Giant dracaena
Giant dumb cane
Giant hogweed
Glacier ivy
Gladiolas
Gloriosa lily
Goatweed
Gold diffienbachia
Gold dust dracaena
Golden birds nest
Golden pothos
Golden ragwort
Good luck plant
Grapefruit tree
Grass palm
Greater ammi
Green gold napthysis
Ground apple
Groundsel
Hahn's self branching English ivy
Hashish
Hawaiian Ti plant
Heartleaf philodendron
Heavenly bamboo
Heliotrope
Hellebore
Hercules' club
Hills of snow
Hoary alyssum
Holly
Hops
Horse chestnut
Horsehead philodendron
Horseweed
Hortensia
Hosta
Hound's tongue
Hurricane plant
Hyacinth
Hydrangea
Impala lily
Indian Apple
Indian Borage
Indian hemp (marijuana)
Indian mustard
Indian Pink
Indian Rubber plant
Inkberry
Iris
Iron Cross begonia
Ivy arum
Jack-in-the-Pulpit
Jade plant
Japanese Show lily
Japanese yew
Jerusalem cherry
Jerusalem oak
Jimmy weed (burrow weed)
Jonquil
Kaffir lily
Kalanchoe
Kiss-me-quick
Klamath weed
Kudu lily
Lace fern
Lacy tree philodendron
Lady-of-the-Night
Lambkill
Lantana
Larkspur
Laurel
Lavender
Leatherflower
Leeks
Lemon
Lemon grass
Lemon verbena
Lenten rose
Lilies
Lily of the Palace
Lily of the Valley
Lily of the Valley bush
Lime
Lobelia
Loco weed  (Astragalus spp.; Oxytropis spp.)
Locust tree
Lord-and-Ladies
Lovage
Macadamia nuts
Madagascar dragon tree
Maidens Breath
Malanga
Maleberry
Marble Queen
Marijuana
Marjoram
Mauna Loa Peace lily
Mayapple
Mayweed
Meadow Saffron
Medicine plant
Metallic leaf begonia
Mexican breadfruit
Milfoil
Milkweed
Mint
Mistletoe "American"
Mock Azealea
Mole Bean plant
Morning Glory
Morning-Noon-and-Night
Moss rose
Mother of Millions
Mother-in-law plant
Mother-in-law's tongue
Mountain laurel
Mums (chrysanthemums)
Naked Lady
Nandina
Narcissus
Nasturtium (watercress)
Needlepoint ivy
Nephthysis
Nicotiana
Nightshade
Oak tree and acorns (acorns can pierce intestines, NOT poison)
Octopus tree
Oilcloth flower
Onion
Orange tree
Orange day lily
Oregano
Oregon holly
Ornamental pepper plant
Pacific yew
Painter's palette
Pale laurel tree
Palm lily
Panda plant
Paraguayan jasmine
Parsley
Patterson's curse
Peace begonia
Peace lily
Peach tree and fruit pits/seeds
Peacock flower
Pencil cactus
Peony
Perennial pea plant
Periwinkle
Philodendron Pertusum
Pie plant
Pieris
Pig lily
Pigtail plant
Pink Pearl
Pinks
Plantain lily
Plum tree
Plumosa fern
Poinciana
Poinsettia
Poison Daisy
Poison Hemlock
Poison Parsnip
Ponderosa pine tree
Portulaca
Prayer bean plant
Pride-of-India
Primrose
Privet
Purslane
Queensland nut (Macadamia nut)
Racemose asparagus fern
Ragwort
Ranger's button
Rattlebox
Rayless goldenrod
Red emerald plant
Red maple tree
Red Princess plant
Red-marinated dracaena
Rex begonia
Rhododendron
Rhubarb
Ribbon plant
Ridderstjeme
Rock moss
Roman chamomile
Rosebay
Rubrum lily
Running myrtle
Russian Knapweed
Sabi Star
Sacred Bamboo
Saddle Leaf
Sago palm
Satin Pothos
Scented Geranium
Schefflera
Scouring Rush
Seaside Daisy
Seven Bark
Shamrock plant
Shatavari
Sheepkill
Silver Dollar plant
Silver Dollar Jade plant
Skunk Cabbage
Snake lily
Snake plant
Solomon's lily
Sorrel
Sowbread
Spanish Thyme
Spindle tree
Split-leaf philodendron
Spotted dumb cane
Sprengeri fern
Spring parsley
St. John's wort
Staggerbush
Starch root
Stargazer lily
Starleaf
Stinking chamomile
Straight-margined dracaena
Striped dracaena
Sudan grass
Superb lily
Swamp maple tree
Sweet cherry tree
Sweet pea
Sweet William
Sweetheart ivy
Swiss cheese plant
Tahitian Bridal Veil
Tail flower
Taro
Taro vine
Tarragon
Texas Umbrella tree
Ti plant
Tiger lily
Tobacco plant
Tomato plant
Tree philodendron
Tree tobacco
Tropic snow
True aloe
Trumpet lily
Tulips
Umbrella leaf plant
Umbrella tree
Variable diffienbachia
Variegated philodendron
Variegated Wandering Jew
Vinca
Viper's Bugloss
Virgin's Bower
Wahoo
Wake Robin
Wandering Jew
Warnecki dracaena
Water Flag
Water Hemlock
Wax-Leaf
Weeping Fig
Western yellow pine tree
Western yew
White heads
White snakeroot
White Indian Mustard
Wild Arum
Wild Calla lily
Wild Carnation
Wild Coffee plant
Wild radish
Winter cherry tree
Winterberry
Wintercress
Wisteria
Wood lily
Wormseed mustard
Yarrow
Yellow Indian mustard
Yellow oleander
Yellow pine tree
Yellow star thistle
Yellowrocket
Yesterday, Today, Tomorrow plant
Yew tree
Yew pine tree
Yucca

This list is from the ASPCA - 

the American Society for the Prevention of Cruelty to Animals.