Black-eyed Susan
One common North American plant of the genus Rudbeckia is the black-eyed Susan (Rudbeckia hirta). This perennial plant is known for its bright yellow flowers with dark centers, resembling a black eye. It is a popular choice in gardens and is also native to parts of Canada and the United States.
rudbeckia
Sow seed in spring and early summer.
Godetias
The plant develops deep, slender, black roots
Nicotiana is the genus name for the plant Nicotiana, it belongs to the family Solonaceae
RUDBECKIA
rudbeckia
Rudbeckia
Rudbeckia
Rudbeckia, sunflowers and daisies have golden ray-like flowers and are cultivated in North America.
Sow seed in spring and early summer.
Any yellow, ray-flowered member of the Asteraceae could fit this bill. There are literally hundreds, if not thousands, of possible species. The list would certainly be narrowed down by naming only those that are cultivated. Two very common possibilities include Rudbeckia and Helianthus. There are countless others.
Godetias
The dogbane is a North American plant which has bell-shaped white and pink flowers. Plants with bell-shaped flowers are from the genus Apocynum.
A zygopetalum is a plant of the genus Zygopetalum, a type of South American orchid.
The plant develops deep, slender, black roots
North American Plant Protection Organization was created in 1976.