In a certain type of inflorescence, the main axis continues to grow and the flowers are borne laterally in an acropetal succession. Which of the following plants exhibits this type of inflorescence?

Step-by-step solution

The inflorescence described is racemose, as the main axis continues to grow indefinitely and flowers are borne in an acropetal succession (oldest at the base, youngest at the apex). Among the given options, Lupinus belongs to the family Fabaceae, which is characterised by a racemose inflorescence. Petunia and Solanum belong to the family Solanaceae, which typically has solitary, axillary, or cymose inflorescences. Tulipa belongs to the family Liliaceae, which also has solitary or cymose inflorescences. Answer: Lupi