Sneezeweed
Helenium montanum Nutt.
Sneezeweed is an annual or perennial leafy herb that has one or several stems. the stems are slender, smooth, erect, 6 to 28 inches high, solitary or tufted from a perennial, strong-scented root. Leaves are alternate, lance shaped, and smooth edged from 1 to 6 inches long; lower stem leaves lanceolate or oblong, usually deeply cut or cleft, the upper leaves small and clasping the stem.. Yellow-orange flowers with darker orange centers grow in clusters. Each head is one-half to three-fourths of an inch broad and one-third to one-half of an inch high. Located on marshes, banks or ditches or streams, and other moist or wet low places up to ma little over 1900 mountain elevation. In the Western States, western sneezeweed is common to many mountain ranges including the mountains of southeastern Idaho. Nuttall recorded sneezeweed in the Rocky Mountain range on the borders of the Lewis' River.
All plant parts are poisonous.