Question

are the flowers of groundnut underground
if not then
why the fruits are underground
and do they migrate from air to underground​

Answer 1

The peanut plant (Arachis hypogaea) is an annual with edible seeds that grow in hard-shelled seedpods beneath the soil surface. ... Before setting seed, it blooms with small yellow, orange, white or cream-colored flowers.

The peanut's distinctive fruiting behavior begins after the plant's flowers are fertilized. A flower's developing ovary enlarges into a downward-growing, stemlike structure called a peg. The peg grows toward the soil surface and eventually pushes its tip below the surface. Beneath the surface, the peg's growth changes from a vertical to a horizontal direction, and the embryonic seedpod begins to develop at the tip of the peg. Because the developing pods need to be able to push through the soil as they grow, peanuts do best when the soil has a loose texture and has been well tilled before planting.

Each peanut plant may produce more than 40 pods, and each pod contains one to five edible, nutlike seeds.