Glacier Lily
Symptoms: Sudden vomiting, diarrhoea, abdominal pain, cardiac arrhythmia, respiratory depression, and excess salivation.
Treatment: Groundsel, Branching Phacelia, Wild Strawberry, Wild Iris, Wild Rosemary, Weeping Willow.
Location: Northern Range (Dunraven Pass).
Yellow Pond
Symptoms: Sudden vomiting, diarrhoea, severe abdominal pain, blistering skin, and seizures.
Treatment: Groundsel, Marsh Marigold, Wild Strawberry, Yampa, Wild Iris.
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Location: Central Yellowstone (Yellowstone Lake, Lake Village).
Yellow Violet
Symptoms: Dehydration, lunacy, tremors, palpitations, and death (if not removed from the stomach within 48 hours of ingestion).
Treatment: Paintbrush, Branching Phacelia, Water, Marsh Marigold, Globe Flower, Wild Rosemary, Wild Iris.
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Location: Western Yellowstone.
Prairie Smoke
Alternative Name(s): "Sleeping Death"
Symptoms: Drowsiness, slowed heart rate, and abnormal blood flow.
Treatment: Mexican White Sagebrush, Wild Strawberry, Globe Flower, Buttercup, Wild Iris.
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Location: Everywhere.
Forget-Me-Not
Symptoms: Amnesia, night terrors, insomnia, and insanity.
Treatment: Paintbrush, Globe Flower, Wild Iris.
Location: Northern Range.
Woodland Star
Alternative Name(s): "False Cow Parsnip"
Symptoms: Causes liver failure within 2 hours of being swallowed.
Treatment: Groundsel, Branching Phacelia, Wild Strawberry, Globe Flower, Wild Iris, Douglas Fir.
Location: Everywhere.
Lodgepole Pine
Symptoms: Severe dermatitis leading to open sores, skin lesions, and blisters.
Treatment: Paintbrush, Mexican White Sagebrush, Marsh Marigold, Skyrocket Phlox, Wild Strawberry, Buttercup, Wild Iris, Weeping Willow.
Location: Everywhere.