● The part of the leaf by which it is attached to the stem is called a petiole. Hence statement 1 is correct. ● The broad, green part of the leaf is called the lamina. Hence statement 2 is correct. ● The lines on the leaf are called veins. ● These give support and transport water and mineral through the leaf. ● A prominent line in the middle of the leaf is called the midrib. Hence statement 3 is incorrect. ● The design made by veins in a leaf is called the leaf venation. Hence statement 4 is correct. ● If this design is net-like on both sides of the midrib, the venation is reticulate.