Weeds of the Great Plains

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Across
  1. 4. Can accumulate high nitrate concentrations
  2. 5. Flowers are white to deep pink corollas
  3. 6. Stems are sparingly branched, thick, with velvety substance
  4. 7. Toxic to cattle, but not to sheeps and goats
  5. 8. Native Americans used this plant as an astringent
Down
  1. 1. The poisonous substance in this plant is hydroquinone
  2. 2. Seeds are eaten by many kinds of birds
  3. 3. Flowers open during early morning and close late in the day