Which of the plants covers a larger part of the world, Calibrachoa or Astilboides?
Calibrachoa: Calibrachoa (ca-libra-KO-a) is a genus of plants in the Solanaceae (nightshade) family. Calibrachoa:  They are found across much the same region of South America as petunias, from southern Brazil across to Peru and Chile, inhabiting scrub and open grassland. Astilboides:  It comes from China and differs from its former relatives mainly in its leaf shape.
Calibrachoa