Orthotropous: When the micropyle, body of the ovule and funicle lie in one vertical plane the ovule is called as Orthotropous, eg, Polygonum, Piper etc. Hemianatropous: When the funicle lies at right angles to the body of the ovule and micropyle, the ovule is called as hemianatropous. In other words, here the body of the ovule has rotated by 90∘ eg, Ranunculus, Primula, Golphimia etc. Anatropous: When the funicle lies parallel to the body of the ovule and micropyle, ie, body of the ovule has rotated by 180∘ the ovule is called as anatropous. It is the most common type of ovule found in many families such as Malvaceae, Compositae, Cucurbitaceae, Solanaceae etc. Amphitropous: It is similar to anatropous except for its U-shaped embryo sac. Here the curvature has affected the nucellus eg, Butomus, Crossosoma etc. Campylotropous: It is similar to hemiana-tropous except for the fact that due to further curvature the micropyle comes to lie closer to funicle and becomes horse-shoe shaped eg, Chenopodiaceae, Capparidaceae and several members of Leguminosae and Cruciferae.