Question

which is the tallest and the smallest gymnosperm plant

Answer 1

the LARGEST Living Plants is
Sequoia

The SMALLEST plants are Fresh Water Green Algae (Chlamydomonas genus).

hope this helps u

Answer 2

Tallest Gymnosperm plant: The coniferous Coast redwood (Sequoia sempervirens)

Shortest Gymnosperm plant: Ginkgo

Explanation:

Seed bearing vascular plants like cycads, yews, ginkgo etc. In a gymnosperm plant's ovary, the seeds are not enclosed and similarly the name suggests Gymnosperm which means naked seeds.

The "coniferous Coast redwood" which is the tallest Gymnosperm plant and it is also the tallest tree on the earth. It is about a height of 380.30 feet.

The smallest specie called Ginkgo which found in China. It is about 25 cm of height.