There are literally hundreds of poisonous plants in the USA. Here the ones to keep away from dogs and kids.
Flower |
Part |
Effect |
| Snowdrops | bulbs | Digestive upset & nervous symptoms |
| Star of Bethlehem | bulbs | Digestive upset & nervous symptoms |
| Autumn Crocus | bulbs | Digestive upset & nervous symptoms |
| Daffodil | bulbs | Digestive upset & nervous symptoms |
| Hyacinth | bulbs (from ALL) | Affects heart, also purgative |
| Narcissus (small amount) | bulbs | Affects heart, also purgative |
| Christmas Rose | leaves & roots | Affects heart, also purgative |
| Easter Rose | leaves & roots | Affects heart, also purgative |
| Iris | fleshy part (underground) | Affects heart, also purgative |
| Lily-of-the-Valley | leaves | Affects heart, also purgative |
| Foxglove | plant | Affects heart, extremely dangerous |
| Nightshade | vine & leaves | Affects heart, extremely dangerous |
| Larkspur | plant & root | Digestive upset -- nervous symptoms |
Other potentially dangerous garden flowers: Sweet Pea, Bleeding Heart, Poppies, Golden glow, Black-eyed Susan, Nicotiana.
House Plants |
Part |
Effect |
| Oleander & Poinsettia | one leaf | Death (stops heart) |
| Dumbcane & Philodendron | plant | Severe burns of mouth & digestive tract |
| Mistletoe | berries | DEATH |
| Rosary Pea & Castor Bean | 1 - 2 seeds | Very common and very dangerous |
| Foxtails | plant | |
| Narcissus(small amount) | bulbs | Affects heart, also purgative |
Ornamental Plants |
Part |
Effect |
| Yew | needles & berries | Sudden death with no warning (common hedges & foundation plantings) |
| Daphne | berries, leaves & bark | Severe burns of digestive tract causing death |
| Wisteria | seeds from pods | Digestive upset |
| Golden Chain | any part of some species | Excitement, staggering, convulsions, coma |
| Mushrooms | any part (blue-green pond scum | Deadly |
| Algae | bulbs | Very poisonous |
Vegetable |
Part |
Effect |
| Potato | green spots, sprouts | extremely poisonous (oxalic acid) |
| Rhubarb | leaves | extremely poisonous (oxalic acid) |
| Onions in large amounts | destroys red blood cells |
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