African marigold is scientifically known as \textit{Tagetes erecta}. It is a tall, upright species of marigold widely cultivated for ornamental and decorative purposes due to its large, showy flowers.
Option (A) Tagetes patula: This is the French marigold, a smaller and bushier variety.
Option (B) Tagetes erecta: Correct. It refers to the African marigold.
Option (C) Tagetes minuta: Known for its essential oil, not commonly grown for flowers.
Option (D) Tagetes tenuifolia: This species produces small yellow flowers and is less commonly grown.