Question

Circinate vernation in ferns refers to

• A. Uncoiling of new-leaves from the base toward the apex
• B. System of leaf gaps in the stems
• C. Arangement of son on the leaf surface
• D. Presence of adventitious roots on the rhizome

Answer 1

Answer: (A)

Uncoiling of new-leaves from the base toward the apex

Circinate venation refers to the emergence of new leaves in ferns by unrolling from a tight coil. The coiled frond that emerges initially is termed a fiddlehead or crozier. This coiled structure protects the tender tips of the leaves. The lower parts of the frond expand first and toughen up, supporting the further growth and expansion of the front. Therefore, the uncoiling or unrolling of the leaves occurs from the base toward the apex.

So, the correct option is 'uncoiling of new leaves from the base toward the apex'.