Its because of kind of seed it is
The four flower structures of a flower are: 1. Calyx 2. Corolla 3. Androecium 4. Gynoecium
Tomatoes are flowers because plants are flowers. then when you see them grow they have another flower. The same thing with some other vegetables.
rose
It is a flower from metrosideros tremuloids, a species found only on the island of O'ahu in Hawaii.