Testa
The seed coat, which is the protective covering of a seed and develops from the outer layers of the ovule. Daylilies generally have a crust of phytomelan on the testa, which gives them their black color.
The seed coat, which is the protective covering of a seed and develops from the outer layers of the ovule. Daylilies generally have a crust of phytomelan on the testa, which gives them their black color.