DENDROLOGY

Detailed explanation-1: -Cotyledons are the first embryonic leaves that store nutrients during germination. The plumule is the top of the epicotyl and forms the first true leaves, which is called the leaf primordia. The hypocotyl is the region between the cotyledons and the radicle.

Detailed explanation-2: -Epicotyl extends above the cotyledon, composed of the shoot apex and leaf primordia. Primordia are the plant’s first true leaves and shoot of the plant. Cotyledons are the first embryonic leaves from a germinating seed.

Detailed explanation-3: -Hint: Epicotyl is the first part of the plant that emerge after the germination, where as it is important in the beginning stage of the plant life, whereas hypocotyl is the structure that can be observed in the seedling after the germination.