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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.

Frequently (and not so frequently) Asked Questions

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Can I use a picture off of your website?

Need more information about Umbellularia californica?

Are oak trees poisonous to goats?

Are African Violets poisonous to dogs?

Is Agave americana a poisonous plant or am I allergic to it?

Is alfalfa hay causing the welts on my horse?

Is Aloe Vera toxic to rabbits?

Is Amaryllis poisonous to humans and housepets?

Are immature apricots as poisonous as mature apricots?

What is the most poisonous substance in Argemone mexicana?

Need more information on these plants...

How do avocados affect horses?

Can the azelea cause previously normal canine sperm to become abnormal in morphology?

Are these substances toxic?

How do I get rid of knot weed or bamboo?

Is bamboo toxic to dogs?

Which poisonous plants are in the Bay area of California?

Are these berries poisonous?

What could have caused my rash?

Can black eyed susans hurt horses?

Does black locust wood affect horses?

Can a black walnut stump poison a garden?

My sister took too high a dose of bloodroot. What will that do to her?

Is Bogainvillea poisonous to horses?

What kind of plants would cause the symptoms of anti-freeze poisoning?

Is bougainvillea poisonous to rabbits?

Is bougainvillea poisonous to dogs?

Can I have some information on Brayera anthelmintica?

Why is brocolli poisonous?

Has a scientific analysis ever been made of Buckeyes?

Would these common houseplants be poisonous to my pet rabbit?

I have a huge bush that causes rashes. How do I get rid of it?

Have you ever heard cattle dying from eating buttercup?

Are buttercups dangerous to horses?

Are buttercups dangerous to horses?

How can we figure out which of these plants are native to California?

DO you have information on California laurel?

Do you have any information on a plant called

Do you know who canavanine was named after?

Are Cape Murtle and Pampas Grass poisonous to horses?

Is too much carotene bad for you?

Should I be concerned about the castor bean plant in my yard?

What is wrong with my cat?

Does this cat food have toxic elements in it?

Please explain the difference between asteracae and compositae.

Is mother-in-law tongue poisonous to cats?

How does Spathiphyllum affect cats?

Are my evergreens poisonous?

My dog ate something and had a bad trip...

Has any of your research on nematicidal effects been published?

Are any of these plants poisonous to horses?

Are cherry trees poisonous to ponies?

I need information on some plants...

Could chimphilla pills have caused muscle and nerve pains?

Could you give me some information on Colchicum Autumnale (Meadow Saffron)?

Could you help me identify this vine?

Do you have any information on creeping indigo?

I need information on creeping indigo...

Could you help me find a website on the critical effects and target organs for non-carcinogens?

Is Crown Vetch safe to feed to horses?

Do cycads pose a risk to livestock?

I have some questions pertaining to cynogenic glycosides...

Are Leyland Cypress trees toxic to horses?

Can your dairy intake cause a deposition of calcium?

Is Death Parasol the same as Death Cap?

Is Golden Dew Drop poisonous?

Are acorns toxic to dogs?

Are Pieris Japonica plants poisonous to dogs?

Could you help me find some information on plants poisonous to dogs?

Are there any poisonous plants that could create these symptoms in my dog?

What is in the domperidone?

What could cause these horses to drool?

Is dumbcane toxic to humans?

Why are these elk dying?

Are elderberries poisonous to humans?

Are elephant ears poisonous?

Is Mountain Laurel poisonous to elk?

Do you know where I can get up to date information on the natural form of ellagic acid?

Could you explain the toxicity of erucic acid to humans?

Are you aware of any species of eucalyptus that may be toxic to domestic/wildlife?

I would like some advice regarding FA analysis of feeds...

Can fescue grow in Florida?

Is there an additive that I can put in feed for treating and preventing the effects of fescue?

Are these plants toxic?

Could you tell me an additive I can give to my animals to treat fescue poisoning?

Can the cold weather kill off Fiddleneck?

I need some information on Fiddleneck...

Could Laurentia longiflora be responsible for my fish dying?

Could tannins toxify salmoni fisheries?

Can flax seeds be poisonous to horses?

Are the any poisonous weeds in Florida?

Do you have any information on Poison wood?

Can you give me some advice?

What do you know about formic acid and fallow?

Is alfalfa toxic once frost hits?

Is the Fuschia plant poisonous to dogs?

Is garlic poisonous to dogs?

Should we give selenium to our buck(goat)?

Can you help me identify the symptoms associated with toxic Echium species?

Do you know where I can find a 4-H goat group for my daughter?

How susceptible are goats to laurel poisoning?

Can you use Rumensin to control ketosis?

Do you know of any plants that kill gophers?

Do you have any information on gossypol?

Are Ficus tree leaves poisonous to baby guinea pigs?

Do you have any information about heart worm disease?

What are the physical differences between water hemlock and

Are Hibiscus poisonous to horses?

Are there any poisonous plants that can cause death in dogs, horses or humans without symptoms?

Do you have any information on hoary allyssum?

Are hog pellets poisonous to horses?

Can you help me figure out what kind of plant I have here?

What should I do about my Holly bushes?

Could you give me some information on Hollyhock?

Is my tree poisonous?

Are Burford holly berries poisonous?

Is honeysuckle poisonous?

Are acorns poisonous to horses?

Can horse nettle poison the meat of beef cattle?

What could cause these horses to drool?

Are Chephalara plants and Philodendra plants poisonous?

Why are companies who sell house plants not required to place a warning on the containers?

Could hydrangea make my dog puke?

What plants are safe for my iguanas?

Can you help me find information on these plants?

Can you tell one poison rash from the other?

Are Jade plants poisonous to children?

Are these plants poisonous?

Is St Johns Wart poisonous to humans?

Can give me some advice?

Could you give me a list of landscape plants that are toxic to horses?

Could you tell me if these landscaping plants are poisonous horses?

How dangerous are lantana berries?

Do you have any information on Laudanum?

Do you have any information on Laurentia longiflora?

A few questions regarding your webpage...

What can I do for my horse?

Do you know anything about lolium temulentum?

Could mandrake fruit make my wife get pregnant?

Can marigold leaves be poisonous to a canary?

How does experimental data compare with poisoning cases?

Do you have a picture of Meadow Saffron?

Is this normal?

Do you have plans for a goat milk stand?

Are mimosa trees toxic to horses?

Are the seeds of Mimosa Pudica poisonous?

How long does it take for a goat to recover from mistletoe poisoning?

Is mistletoe toxic to cattle?

Is Mountain Laurel toxic to horses?

Can you give me some information about human exposure to Monkshood?

Do you have any information on Monstera deliciosa?

Could you tell me the scientific name of this plant?

Is the plant in my backyard poisonous?

What is the most poisonous part of these plants?

What is the most poisonous plant in the world to humans?

Is this mushroom poisonous?

What kind of a poisonous bean could you put in a soup?

Do you have any information on Sting Nettle?

Could Niacin be used in some drug-related way?

What could be the problem here?

Are there any plants that cause death in dogs, horses or humans without symptoms?

Can you help me find some non-toxic plants for a horse arena?

What could have caused these blisters?

Could pine needles poison my goat?

Should I move my horse away from the oak trees?

Could you give me more information on oleander?

Are Oleander plants harmful to horses?

What type of poison is present in oleander?

Can you give me some information about Oleander?

Is Oxalis regnellii poisonous?

Do you have any information on a plant called Hogswart?

What is in avocado that kills parrots?

Could you give me some information about Peace lilies?

Could you tell me if Peace Lily is poisonous?

Could you give me some information on the toxicity of the peace lily?

Is this peace plant toxic?

Have you ever heard of poison sumac being used as a filler in peet moss?

Need macro and microscopic identification of Atropa belladonna.

What kind of reaction should I look for in a baby who chewed a philodendreon leaf?

Would you please enlighten me as to the existence of such an alkaloid phytoerythrin?

Are pine trees harmful to horses?

Do you know of a pink form of Delphinium tricorne?

Is Plumeria rubra poisonous to cats?

Do you think that my dog is going to get worse?

Is the Poinsettia poisonous?

Where can I get photos of poisonous plants for field identification?

Do you know where I can find poison ivy extract?

Are crassula (jade plants) poisonous to humans?

Are the same plants that are poisonous to humans, poisonous to animals?

Is poison ivy only poisonous to humans and primates?

How does one kill the poison oak plant?

Do you have any information on Poison Parsnip?

I need some information on poisonous plants...

Do you know of any oral medication to prevent Poison Ivy?

Could you give me some information about the toxicity of these plants?

Are these plants really poisonous?

Is there any way to prevent your horse from eating poisonous plants?

Are poke berries harmful to humans?

Are pokeberries poisonous when injested by a child in small amount?

Could you give me some information on California Pokeweed?

Are Pokeweed berries poisonous?

Are ligustrum hedges poisonous?

Is the Royal Robe Potato Bush poisonous?

Could you give me some information about the toxicity of Solanum crispum?

Is Scindapsus aureus hazardous to the public?

Could you answer a few questions about the Precatory pea?

Could 800 IU of vitamin D harm a fetus?

Could your intake of dairy cause psuedogout?

What could cause this condition?

What do you think about my reaction to pyrachantha?

Do you have any information on the pyrus, prunus and malus genus of trees?

Can you answer a few questions about rabbits?

What do you know about parasite transmission from rabbit feces?

Where can I find information on rabbit history?

Does Cornell have a price list for the resources available to 4-H rabbit project leaders?

Does Ragwort exist in the US or Canada?

Could You give me some information on toxicity of Alsike and Red Maple?

Can Red Tip plants cause cancer?

How does a person reverse the damage done by Vitamin A toxicity?

Is it possible for ricin to be absorbed through the skin and cause death?

How does is Ricin different than a bacterium?

I am looking for information reguarding ricin...

Could Ricin be used by terrorists?

I need some information about Ricin...

Could you tell me some more about the Castor Bean plant?

Could you answer some questions about powdered Ricin for me?

How should I reference some information I took off of your website?

I need some information about the Rosary Pea for a book...

Are roses harmful to dogs?

Do you know of a list that compares the plant toxicity in horses and ruminants?

Are you familiar with the toxins in a Russian Olive Tree?

Are Sambucus canadensis and Sambucus nigra similar?

What are the most poisonous plants on earth?

Do you have any information on the toxicity of vitamins?

Could Selanium poisonimg cause these symptoms in my horse?

Can you get Selenium poisoning from drinking too much milk?

Does this situation seem reasonable?

Is the Shamrock plant harmful to cats?

Can you give me some information about sheep sorrel?

Can you send me a list of plants toxic to sheep?

What could be wrong with my goats?

Could eating one small bad mushroom poison me?

Do you have any information on SMCO?

Could vitamins cause a loss of taste and smell?

How is Ricin different than Elapid snake venom?

Dou you know why my dog is acting this way?

Could you help me out with some information about Hemlock?

Dou you know if solanine can cause joint inflamation?

Do you have any experience working with Euphorbia sominalensis sap?

Is the a way to manage sorghum sudan grass to eliminate its poisonous effects?

Does docweed cure poison ivy?

Are these plants, indigenous to S.D., poisonous to humans as well as livestock?

Could you give me some more information about Spartium Junceum?

Can you tell me if spathiphyllum are poison to children and pets?

Is Spathiphyllum poisonous?

How to treat Steely Wool Syndrome in sheep?

Could you give me some information on these succulents?

Could you send me some information about swainsonine?

I have a question reguarding sweet grass...

Are sycamore leaves poisonous to horses?

Are snowberries toxic through the skin?

Could you answer some questions for my book?

Could I have some more information on Tartago tea?

Do you have any information about California Pokeweed?

What do you think about using tobacco or garlic to get rid of worms in goats?

Which part of the tomato plant contains the Tomatine?

Is Tomatine considered to be one of the solanum-type glycoalkaloids?

Are tomato plants poisonous?

Is it dangerous to take this many vitamins?

Could you please tell me if the following plants are hazardous?

Are liriope, bottlebrush and ficus benjamina considered toxic to animals?

Can I plant these trees near my horses?

What is poisonous about tung oil?

Could you provide me with some information about Tung Oil?

Why is U. Dioica classified as a toxic plant?

How to make sure your horse is getting enough Vitamin E and Selenium?

Can crown vetch be harmful to horses?

Are the berries from a viburnum dentatum Chicago lustre poisonous?

Could you give me some information about toxicity?

Should I be concerned with taking this much vitamin D?

What are the symptoms of vitamin D toxicity?

Can vitamin E be toxic?

Can vitamin B be toxic?

Have you ever heard of vitamin D being related to deafness?

Do you know of any plants that can cause the vocal chords to be paralyzed?

Could you give me some information concerning vomitoxin?

Do you have any information about warfarin toxicity, necropsy findings, and specimen collection?

Are the tannins in my well water dangerous?

Are these wildflowers toxic?

Are willow branches poisonous to rats?

What woods make good wood fiber for horse footing?

Is there some type of wood that would cause a skin rash?

My daughter made tea from some unknown yellow bell shaped flowers...

Could a tea named Yerba de meite cause a positive drug test?

Are any of the following plants poisonous to children, horses or dogs?

What plant has the common name of Zebra Plant, and could it have caused Leukemia?

Please elaborate on degrees of poisonous plants.

Is Tonka bean flavoring poisonous?

Is there any danger in cutting and burning Nerium Oleander?

Are poinsettias poisonous to dogs?

What nitrate level in drinking water is toxic?

Can Ficus lyrata be used as a supplement for parrots?

Is chrysanthemum tea safe to drink?

What is the toxic chemical in Datura metel?

Why are alfalfa and Tall fescue on the list of poisonous plants?

What are these gourd-like things in my pasture?

Compare and contrast plants toxic to horses and ruminants.

What is the toxicity of pothos and wandering jew on kittens?

What is the most interesting fact you know about poisonous plants?

What is the most dangerous fact about poisonous plants that you know?

Do poisonous plants have anything in common? Do they look the same?

What would happen if you were exposed to a poisonous plant?

Is this Oleander tree safe for my dog?

How do you identify an Alsike clover?

How should Ground Hemlock be handled and disposed of?

What should I do with the Ground Hemlock stump?

Will Ground Hemlock continue to be toxic?

Is blue green algae safe for horses?

Can you tell me more about nitrite poisoning in sheep?

How can I get rid of this horsetail (equisetum arvense)?

Is alfalfa really a poisonous plant?

Is goldenrod harmful to sheep?

Are chokecherries poisonous to goats?