Plant

Location(s)

Signs

Arrowgrass

Meadows, low to moderate elevation

Muscle twitching, convulsions, difficult breathing

Mountain Laurel,
Black Laurel,
Labrador Tea,
Rhododendron

Mountains of NW and east. Also ornamental.

Violent vomiting and retching, colic, loss of appetite, muscle twitches

Tobacco Tree or
Tobacco

Waste places

Convulsions, then depression and sweating

Oleander,
Foxglove

Ornamental

Difficult breathing, heart failure, colic, diarrhea, blue membranes of the mouth

Castrobean

Ornamental

Severe diarrhea

Wild Cherry,
Choke Cherry

Existing everywhere

Difficult breathing, convulsions, bright red blood and rapid death.

Jimsonweed

Existing everywhere

Dry mucous membranes, dilated pupils, disorganized behavior and excessively excitable

Nightshade

Existing everywhere

Vomiting, weakness, groaning

Water hemlock

Existing everywhere

Foaming at mouth, convulsion, muscle twitching, death in 15-30 minutes

False hellebore,
Corn lilly

High mountains and meadows

Vomiting, salivation, convulsions, fast irregular pulse

Death camas,
Sandcorn

Hills, fields, meadows in Spring

Foaming at mouth, convulsions, vomiting, fast weak pulse

Dogbane,
Indian Hemp

Existing everywhere

Convulsions, vomiting, diarrhea, irregular pulse

Western
Sneezeweed

High mountain meadows

Vomiting, frothing at the mouth, depression, coughing, weak and irregular pulse