Appearance
Downy lobelia is a perennial herb that grows up to 2.5 ft tall. Leaves are simple with a toothed margin. The flowers are blue to violet, five-lobed, and bloom from July to October.''Lobelia puberula'' is similar to two other ''Lobelia'' species in to the Eastern United States, ''Lobelia inflata'' and ''Lobelia siphilitica'' ; all display the characteristic "lip" petal near the opening of the flower and the "milky" liquid the plant excretes.
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