Some Poisonous Plants
The following plants have been identified as toxic specifically to livestock. They range from deadly (a few leaves as in the case of rhododendrons) to mild and cummulative (such as bracken fern). It can be very useful to make an appointment with your local extension agent to come to your farm and walk the grounds helping you to identify plants of concern.

  • Chrysanthmum
  • Creeping Fig
  • Weeping Fig
  • Poinsettia
  • Pot and Spider mum
  • Arrowhead vine
  • Boston Ivy
  • Collodium
  • Drunk Cane
  • Emerald duke
  • Philodendrum (Heart Leaf, Saddle Leaf, Split Leaf)
  • Marble Queen
  • Majesty
  • Neththytis ivy
  • Pathos
  • Red Princess
  • Amaryllis
  • Asparagus fern
  • Azalea
  • Bird of Paradise
  • Creeping Charlie
  • Crown of thorns
  • Elephant ears
  • Ivy (Glocal, Heart, Needlepoint, Ripple)
  • Jerusalem cherry
  • Sprangeri fern
  • Umbrella plant
  • Delphinium
  • Daffodil
  • Castor bean
  • Indian turnip
  • Skunk cabbage
  • Poke weed
  • Bittersweet (woody)
  • Ground Cherry
  • Foxsglove
  • Larkspur
  • Indian Tobacco
  • Wisteria
  • Soapberry
  • Horse chestnut
  • Buckeye
  • Rain tree
  • Monkey pod
  • Yew (American, English, Western)
  • English holly
  • Privet
  • Mock orange
  • Bird of Paradise
  • Black locust
  • Apricot (almond)
  • Peach, cherry
  • Wild cherry
  • Japanese plum
  • Balsam pear
  • Rhubarb
  • Spinach
  • Sunburned potatoes
  • Buttercup
  • Nightshade
  • Poison hemlock
  • Jimsonweed
  • Moonseed
  • Mayapple
  • Dutchman's breeches
  • Tomato Vine
  • Locoweed
  • Lupine
  • Dologeton
  • Pigweed
  • Water hemlock
  • Mushrooms
  • Mescal bean
  • Angel's trumpet
  • Jasmine
  • Matrimony vine
  • Marijuana
  • Morning Glory
  • Nutmeg
  • Periwinkle
  • Peyote
  • Chinaberry
  • Coriaria
  • Nux vomica
  • Arrow Grass
  • Baneberry
  • Bleeding Heart
  • Boxwood
  • Bracken Fern
  • Burning Bush
  • Buttercup
  • Choke Cherry
  • Christmas Rose
  • Daphne
  • Death Camas
  • Dumb Cane
  • False Hellebore (Hellebore, Indian Poke, White Hellebore)
  • Golden Chain Tree
  • Greasewood
  • Groundsell
  • Holly (berries)
  • Horsetail
  • Hydrangea
  • Jack-in-the-Pulpit
  • Jimson Weed (Thorn Apple, Loco Weed, Devil's Weed)
  • Laburmum (Golden Rain)
  • Lantana
  • Lily of the Valley
  • Lobelia
  • Marsh Marigold (Cowslip)
  • Mayapple (Barberry, Mandrake)
  • Mistletoe
  • Monkshood - 100 species (Aconiute, Friar's Cap, Helmet Flower, Soldiers Cap, Wolfbane)
  • Mountain Laurel
  • Oak - immature leaves and acorns
  • Oleander
  • Rosary Pea
  • Rhododendron
  • Scotch Broom - seed pods
  • Sneezeweed
  • Sour Dock (Sorrel)
  • Spurge Laurel
  • Sweet Pea - regular consumption of seeds
  • Spindletree - seeds
  • Tansy
  • Tansy Ragwort
  • Timber Milk Vetch
  • White Baneberry

Roots and Bulbs
  • Belladonna Lily (Amaryllis)
  • Cowbane
  • Daffodil
  • Fall Crocus
  • Hyacinth
  • Iris
  • Narcissus
  • Snowdrop
  • Star of Bethlehem
  • Trillium
  • Tulip
More Info

Vitamins A,D,E and K are fat soluble (meaning, they can be accumulated in the body) and thus can become toxic when oversupplemented. So it's not a casual matter to supplement them, unlike the B vitamins and C, which can be eliminated relatively quickly from the tissues when over-supplemented. Consult your vet for proper levels.

The National Animal Poison Control Center (NAPCC) provides a 24-hour emergency hotline that every owner should keep in plain sight. The hotline numbers are (800) 548-2423 and (900) 680-0000. The 800 number requires a credit card number and charges a flat $30; the 900 number is $2.95 per minute for a maximum of $30. The NAPCC is a non-profit service of the University of Illinois and is the first animal-oriented poison center in the United States. Since 1978, it has provided advice to animal owners and conferred with veterinarians about poisoning exposures. The NAPCC's phones are answered by licensed veterinarians and board-certified veterinary toxicologists. They have specialized information that lets the experienced NAPCC staff make specific recommendations for your animals; plus over 250,000 records are in their database.
When you call, be ready to provide:

  • Your name, address, and phone number
  • If calling the 800 number, your credit card number
  • The species, breed, age, sex, weight, and number of animals involved
  • The poison your animals have been exposed to, if known
  • Information concerning the poisoning (the amount of poison, the time since exposure, etc.)
  • The problems your animals are experiencing.

Abortion

I've been told to beware of red clover. This type of clover is high in plant estrogen and it causes abortions in ewes. Some types of clover extracts are sold in health food stores for women to use in place of prescriptions for HRT (supposedly the plant estrogen has less side effects than Premarin). The other clovers (white, sub-, etc.) are added regularly to pasture mixes.

The Merck manual says that pine needles (specifically Ponderosa Pine) can cause abortions in cattle. To be on the safe side, check for Ponderosas in your female pastures.

Other Notes

Horses, cattle, goats , rabbit and birds have been poisoned from eating the leaves and other parts of the Guatemalan variety of avocado. The Mexican or smooth skinned fruit variety does not appear to be toxic. The flesh of the fruit of both variety is not toxic. Goats can die in 48 hours with lesions in the heart. In lactating mare and goats, a non-infectious mastitis and necrosis of the glandular part of the udder may develop.

An interesting note about hormones in plants. For those of you who know of people taking Premarin (an estrogen replacement for women), do you know how the pharmaceutical companies obtain it? They keep pregnant horses (mares) in small stalls with urine collection devices, and they don't get exercised. Their urine is processed to get the estrogen. They must be kept constantly pregnant, the foals are then killed and often used for human consumption in Japan. For those of us who might be animal lovers, both Estrace and the Estaderm patch are Estradiol (generic). Estradiol is made from the Mexican yam. When you think of the millions of women taking Premarin, the number of mares being used must be staggering. Those concerned might want to switch off Premarin. It also would seem unwise to feed Mexican yams to livestock.

Scientific Names

I got an email from this wonderful person and he has been kind enough to research the scientific names of the following plants. Thank you so much, Juan!!!

My name is Juan Francisco Bolaños, I study Agronomy (agriculture). I was looking for some poisonous plants, but, as a suggestion, I think that you should include its scientific name, because the names change in each country. I don't know the common names of some plants listed there (in spanish).
Juan Francisco (Dr. Jaime Francisco Bolaños Garaicoa)
I found some latin names for the plants that you mentioned in your web site. Well, it's a long list. Here I include the common name, the scientific name (in parenthesis) and the family of the plant that belongs to.
Hoping that these information will be useful for you, I have to say goodbye.
Juan Francisco

  • Chrysanthemum (Chrysanthemum sp.) Fam. Asteraceae
  • Creeping Fig (Ficus carica) Fam. Moraceae
  • Weeping Fig (Ficus benjamina) Fam. Moraceae
  • Poinsettia (Euphorbia pulcherrima) Fam. Euphorbiaceae
  • Arrowhead vine (Syngonium podophyllum) Fam. Araceae
  • Boston Ivy (Parthenocissus tricuspidata) Fam. Vitaceae
  • Philodendrum (Philodendron sp.) Fam. Araceae
  • Amaryllis (Hippeastrum sp.) Fam. Amaryllidaceae
  • Asparagus fern (Asparagus myriocladus) Fam. Liliaceae
  • Azalea (Rhododendron keiskei) Fam. Ericaceae
  • Bird of Paradise (Strelitzia reginae) Fam. Strelitziaceae
  • Crown of thorns (Euphorbia milii) Fam. Euphorbiaceae
  • Elephant ears (Colocasia esculenta) Fam. Araceae
  • Ivy (Hedera sp.) Fam. Araliaceae
  • Jerusalem cherry (Solanum pseudocapsicum) Fam. Solanaceae
  • Umbrella plant (Brassaia actinophylla) Fam. Araliaceae
  • Delphinium (Delplhinium sp.) Fam. Ranunculaceae
  • Daffodil (Narcissus tazetta) Fam. Amaryllidaceae
  • Castor bean (Ricinus comunis) Fam. Euphorbiaceae
  • Skunk cabbage (Symplocarpus foetidus) Fam. Araceae
  • Poke weed (Phytolacca americana) Fam. Phytolaccaceae
  • Bittersweet (Celastrus scandens) Fam. Celastraceae
  • Larkspur (Consolida sp.) Fam. Ranunculaceae
  • Wisteria (Wisteria frutescens) Fam. Leguminosae
  • Soapberry (Sapindus sp.) Fam. Sapindaceae
  • Horse chestnut (Aesculus hippocastanum) Fam. Hippocastanaceae
  • Buckeye (Aesculus sp.) Fam. Hippocastanaceae
  • Yew (Taxus brevifolia) Fam. Taxaceae
  • English holly (Ilex aquifolium) Fam. Aquifoliaceae
  • Privet (Ligustrum sp.) Fam. Oleaceae
  • Mock orange (Philadelphus coronarius) Fam. Saxifragaceae
  • Black locust (Robinia pseudoacacia) Fam. Leguminosae
  • Apricot (Prunus armeniaca) Fam. Rosaceae
  • Peach, cherry (Prunus persica) Fam. Rosaceae
  • Japanese plum (Prunus salicina) Fam. Rosaceae
  • Rhubarb (Rheum rhabarbarum) Fam. Polygonaceae
  • Spinach (Spinacia oleracea) Fam. Chenopodiaceae
  • Sunburned potatoes (Solanum tuberosum) Fam. Solanaceae
  • Buttercup (Ranunculus sp.) Fam. Ranunculaceae
  • Nightshade (Solanum nigrum) Fam. Solanaceae
  • Poison hemlock (Conium maculatum) Fam. Umbelliferae
  • Jimsonweed (Datura stramonium) Fam. Solanaceae
  • Mayapple (Podophyllum peltatum) Fam. Berberidaceae
  • Locoweed (Astragalus sp.) Fam. Legumiosae
  • Lupine (Lupinus sp.) Fam. Leguminosae
  • Pigweed (Sarcobatus vermiculatus) Fam. Chenopodiaceae
  • Jasmine (Jasminum sp.) Fam. Oleaceae
  • Marijuana (Cannabis sativa) Fam. Moraceae
  • Morning Glory (Ipomoea sp.) Fam. Convolvulaceae
  • Nutmeg (Myristica fragans) Fam. Myristicaceae
  • Periwinkle (Vinca sp.) Fam. Apocynaceae
  • Peyote (Lophophora williamsii) Fam. Cactaceae
  • Nux vomica (Strychnos nux-vomica) Fam. Loganiaceae
  • Baneberry (Actaea sp.) Fam. Ranunculaceae
  • Bleeding Heart (Dicentra sp.) Fam. Fumariaceae
  • Boxwood (Buxus sempervirens) Fam. Buxaceae
  • Bracken Fern (Pteridium aquilinum) Fam. Polypodiaceae
  • Burning Bush (Euonymus afropurpurea) Fam. Celastraceae
  • Choke Cherry (Prunus virginiana) Fam. Rosaceae
  • Christmas Rose (Helleborus niger) Fam. Ranunculaceae
  • Daphne (Daphne sp.) Fam. Thymelaeaceae
  • Dumb Cane (Dieffenbachia sequine) Fam. Araceae
  • False Hellebore (Veratrum sp.) Fam. Ranunculaceae
  • Golden Chain Tree (Laburnum anagyroides) Fam. Leguminosae
  • Horsetail (Equisetum sp.) Fam. Equisetaceae
  • Holly (Ilex sp.) Fam. Aquifoliaceae
  • Hydrangea (Hydrangea sp.) Fam. Saxifragaceae
  • Jack-in-the-Pulpit (Arisaena triphyllum) Fam. Araceae
  • Lantana (Lantana sp.) Fam. Verbenaceae
  • Lily of the Valley (Convallaria sp.) Fam. Liliaceae
  • Lobelia (Lobelia sp.) Fam. Campanulaceae
  • Marsh Marigold (Caltha palustris) Fam. Ranunculaceae
  • Mistletoe (Phoradendron flavescens) Fam. Loranthaceae
  • Monkshood (Aconitum sp.) Fam. Ranunculaceae
  • Mountain Laurel (Kalmia latifolia) Fam. Ericaceae
  • Oak (Quercus sp.) Fam. Fagaceae
  • Oleander (Nerium oleander) Fam. Apocynaceae
  • Rhododendron (Rhododendron sp.) Fam. Ericaceae
  • Scotch Broom (Cytisus scoparius) Fam. Leguminosae
  • Sour Dock (Sorrel) (Rumex acetosa) Fam. Polygonaceae
  • Spurge Laurel (Daphne laureola) Fam. Thymelaeaceae
  • Sweet Pea (Lathyrus odoratus) Fam. Leguminosae
  • Tansy (Tanacetum vulgare) Fam. Asteraceae
  • White Baneberry (Actaea sp.) Fam. Ranunculaceae
  • Daffodil (bulb)(Narcissus sp.) Fam. Amaryllidaceae
  • Fall Crocus (Colchicum sp.) Fam. Liliaceae
  • Hyacinth (Hyacinthus sp.) Fam. Liliaceae
  • Iris (Iris germanica) Fam. Iridaceae
  • Narcissus (Narcissus sp.) Fam. Amaryllidaceae
  • Snowdrop (Galanthus elwesii) Fam. Amaryllidaceae
  • Star of Bethlehem (Ornithogalum umbellatum) Fam. Liliaceae
  • Trillium (Trillium sp.) Fam. Liliaceae
  • Tulip (Tulipa sp.) Fam. Liliaceae


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