Which of the following shows whorled phyllotaxy? A Mustard B China rose C Alstonia D Calotropis
Option C. Phyllotaxis is the phenomenon of mode of arrangement of leaves on the stem. It is of four types, namely alternate, spiral, opposite and whorled. In alternate phyllotaxy, a single leaf arises from the node. This type of phyllotaxy is seen in sunflower, mustard, china rose. In opposite phyllotaxy, two leaves arise from the node in opposite directions. It is seen in guava, Calotropis. In spiral phyllotaxy, the leaves are arranged in spiral fashion along the axis. In whorled phyllotaxy more than two leaves arise from the node. It is seen in Alstonia. It also shows simple reticulate venation. Thus, the correct answer is 'Alstonia.'
