Varieties differ in the number of barbs on the lateral veins, Figure 14. The development of barbs is affected by environment. Some varieties are not pure for this character and may show a wide range in number of barbs. Crease Shape of the crease is influenced by environment and the extent of development of the kernel. While the expression of this character is variable, it is useful for variety identification in a specific area.
Many varieties have creases of similar shape.
Distinct differences for this character can be found in certain varieties making it useful for identification purposes. The shape of the crease may vary from wide, open and V-shaped for the full length of the kernel to tightly closed for almost the entire length of the kernel, with many variations between these two conditions, Figure 15. The width of the point of attachment and shape and length of the narrowed part of the base of the kernel are also useful. Some varieties have a short stem-like projection from the point of attachment on some of the lateral kernels.