Which type of phyllotaxy is observed in Alstonia?
Source: https://www.lazynewton.com/questions/botany/morphology-of-flowering-plants/type-phyllotaxy-observed-alstonia-288467
Quick Answer
Option C
Whorled
— Concept: This question tests your knowledge of phyllotaxy , which is the pattern of arrangement of leaves on the stem…Step-by-step solution
1AnswerC·
Concept: This question tests your knowledge of phyllotaxy, which is the pattern of arrangement of leaves on the stem or branch.
Why (C) is correct: In whorled phyllotaxy, more than two leaves arise at each node and form a whorl or circle. Alstonia (also known as Devil's Tree or Saptaparni) is a classic example of a plant exhibiting whorled phyllotaxy.
Why other options are wrong:
- (A) Alternate: In alternate phyllotaxy, a single leaf arises at each node in an alternating manner (e.g., China rose, mustard, sunflower).
- (B) Opposite: In opposite phyllotaxy, a pair of leaves arises at each node and lie opposite to each other (e.g., Calotropis, guava).
- (D) None of the above: Since whorled phyllotaxy is observed in Alstonia, this option is incorrect.
NEET Tip: Remember common examples for each type of phyllotaxy as they are frequently asked. For whorled, think of Alstonia and Nerium (oleander).
Correct Answer: (C)
Whorled