western sunflower [Blooms: Aug-Sep]

Jerusalem artichoke [Blooms: Aug – Oct]

ox-eye sunflower [Blooms: May-Jul]

American hops [Blooms: Jul-Sep]

giant St. John's wort [Blooms: Jun-Aug]

Kalm's St. John's wort [Blooms: Jun-Aug]

common St. John's wort [Blooms: Jun-Aug]

shrubby St. John's wort [Blooms: Jun-Aug]

round-fruited St. John's wort [Blooms: Jun-Jul]

yellow iris [Blooms: May-Jun]

Torrey's rush [Blooms: Jul-Aug]

kochia [Blooms: Jul-Aug]

two-flowered cynthia [Blooms: Jun-?]

Canada lettuce [Blooms: Jul-Sep]

prickly lettuce [Blooms: Jul-Sep]

spicebush [Blooms: Mar-Apr]

tulip tree [Blooms: June]

grape honeysuckle [Blooms: Jun]