Poisonous Plants
The following is a list of plants known to be toxic to horses
African Rue: Mexican Rue
Alsike Clover
American Bittersweet
Apple: seeds contain cyanide and are harmful in large quantities
Arrowgrass: Triglochin palustris
Asters
Atamasco Lily: Easter Lily
Autumn Crocus
Bagpod
Beefsteak Plant: Perilla Mint
Black Locust: False Acacia
Black Walnut
Boxwood: Common Box
Bracken Fern: Eagle Fern
Broomweed: Resinweed
Buckwheat
Buffalo Bur: Kansas or Texas Thistle
Bull Nettle: Horse Nettle
Bunchflower
Burning Bush: Spindle Tree
Buttercup: Crowfoot
Castor Bean
Cherrylaurel: Mock Orange
Chinaberry: Bead Tree
Cocklebur
Coffeeweed: Coffee Senna
Common Nightshade: Deadly or Black Nightshade
Corn Cockle
Cotton
Coyotillo
Crimson Clover
Dallis Grass: Rye Grass
Day-Blooming Jasmine
Death Camas
Dogbane: Indian Hemp
Eve's Necklace: Texas Sophora
False Hellebore: Indian Poke
Fanweed
Fern Palm: Florida Arrowroot
Fescue
Fitweed: Corydalis
Foxglove
Golden Chain; Golden Chain Tree
Ground Hemlock: Japanese Yew, Western or Pacific Yew, English Yew
Ground Ivy: Creeping Charlie
Groundsel
Hairy Vetch: Betch
Horsechestnut: Fetid Buckeye
Horsetails: Foxtails
Hound's Toungue
Hydrangea
Indian Paintbrush
Inkweed
Japanese Pieris: Pieris floribunda
Jimmyweed: Jimmy Goldenweed
Jimsonweed: Datura
Johnson Grass: Columbus Grass
Juniper
Kleingrass
Kochia: Mexican Fireweed
Larkspur: Poisonweed
Leafy Spurge: Snow on the Mountain
Locoweed: Milk Vetch
Lupine: Bluebonnet
Marsh Maarigold: Cowslip
Mescal Bean: Texas Mountain Laurel
Mesquite: Honey Mesquite
Milkweed
Mistletoe
Mock Azalea: Fool's Huckleberry
Monkshood: Crowfoot
Mountain Laurel: Dwarf Laurel
Oak
Oleander
Onions: Garlic
Pacific Labrador Tea: Western Labrador Tea
Peach
Ply Poison: Staggergrass
Point Locoweed: Point Vetches
Poison Hemlock: Spotted Hemlock
Pokeweed: Pigeon Berry
Prince's Plume: Desert Prince's Plume
Privet: Ligustrum
Rape: Canola, Mustards
Rattlebox: Crotalaria
Red Clover
Red Maple
Rhododendron: Great Laurel
Rosary Pea: Crabs-Eye
Rutabaga
s-39-Lantana
Sacahuista: Beargrass
Saltbush: Orach
Silverlearf Nightshade: Trompillo
Singletary Pea: Sweetpea
Sleepygrass
Sneezeweed: Bitterweed
Squirrel Corn: Staggergrass
Squirreltail Grass: Fowtail Grass
St. Johnswort: Klamathweed
Sweet Clover
Tarweed: Fiddleneck
Texas Nightshade
Tobacco
Water Hemlock: Musquash Root
Whitebrush
Wild Cherry: Black Cherry
Yellow Bristle Grass: Foxtail Grass
Yellow Jessamine: Carolina Jamsine
Yellow Star Thistle: Russian Knapweed



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