University of Maryland Extension

toxic weeds

Toxic Plant Profile: Milkweed and Dogbane

Milkweed is relatively well-known because it’s the primary food source for monarch butterfly larvae. It is, however, toxic to livestock. Dogbane, while lesser-known, is a milkweed relative that is also toxic. There are actually over 140 species of milkweed plants that collectively make up the genus...

Toxic Plant Profile: Hemlock

poison hemlock flowers
There are two types of hemlock: water hemlock and poison hemlock. Although counterintuitive, water hemlock is ten times more poisonous than poison hemlock. Water hemlock is a native perennial that thrives in wet areas. This is the most poisonous thing an animal can eat. All parts of the plant are...

Toxic Plants and Accidental Poisoning

Many plants that are commonly found in and around pastures and hay fields can cause poisoning in livestock animals. In many cases it may be impossible to completely remove all toxic plants, but having the proper knowledge about how to manage against poisoning by toxic plants can be enough to...
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