Burning of the lips, mouth and throat. There are approximately 20 different species. They are perennial, summer or autumn flowering herbs with milky juice. They have erect, non-twining stems. The fruit is the familiar inflated milk-weed pod filled with numerous seeds, each bearing a tuft of long, silky hairs.
Flowers are white, yellowish white, or pinkish white.
Dry mouth, dry warm skin, tachycardia and delirium with hallucinations.