Dog poison is an annual plant found growing in waste places and
gardens, and along hedges and fences, in the north- eastern U.S.,
eastern Canada, and Europe. The white, spindle-shaped root produces
a round, slender, glabrous, blue-flecked, branched stem, 1 to 3
feet high, with alternate, tripinnate leaves. The leaflets are incised,
dark green above and shiny yellow-green beneath. White flowers appear
from June to September.
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