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Updated by Marco Garcia Rivas on May 12, 2017
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Top 10 Most Poisonous Plants

In this list I will provide what i believe to be the top 10 most poisonous and dangerous plants.

1

Castor Bean

Castor Bean

The seeds of Ricinus communis are extremely toxic.

2

Poison Ivy

Poison Ivy

Poison Ivy is one of the most know plants that are poisonous and can cause big rashes

3

Bleeding Heart

Bleeding Heart

Dicentra spectabilis, or bleeding heart, is native to woodlands and is a shade loving perennial. The name bleeding heart describes the unique flowers, which resemble tiny pink or white hearts with drops of blood at the bottom. The roots and foliage of bleeding heart contain alkaloids that are toxic to people and plants if eaten in large amounts.

4

Azalea

Azalea

All parts of the azalea are dangerous if eaten in great quantities. Ingestion of the toxin contained in the plant, andromedotoxin, can result in progressive paralysis, coma and death. But human fatalities from eating this plant are rare.

5

poison oak

poison oak

One of the potential plant dangers lurking in backyards and forests: poison oak.

6

Nerium Oleander

Nerium Oleander

Nerium oleander is a rounded shrub or small tree, with long, dark green leaves and an abundance of single or double, sometimes fragrant flowers in variety of colors. All parts of the plant are extremely poisonous.

7

Narcissus

Narcissus

The entire daffodil is poisonous, but especially the bulb.

8

Foxglove

Foxglove

The flowers, leaves, stems and seeds of foxglove are poisonous.

9

Lily of the Valley

Lily of the Valley

All parts of the plant and berries are highly poisonous.

10

Giant Hogweed

Giant Hogweed

Heracleum mantegazzianum, also known as giant hogweed, is one nasty character. This invasive species can grow up to 14 feet tall. Contact with the plant's sap can cause severe skin and eye irritation and even blindness. Exposure to this biennial or perennial noxious herb can even result in scarring. In a nutshell: stay away!