Columbia subject headings:
Harvard subject headings:
Annuals (Plants) industry--East (U.S.)--History.
Annuals (Plants) industry--United States--History.
Annuals (Plants)--East (U.S.)--History.
Annuals (Plants)--United States--History.
Flowers.
Plants.
Princeton subject headings:
Annuals (Plants) industry--United States--History.
Annuals (Plants)--United States--History.