The term 'vernation' refers to the shape of the cross-section of juvenile leaves, especially in buds. It is an important vegetative identification character in the Poaceae – Grasses and may be examined best at innovation shoots. The main differentiation is between rolled vernation (e. g. in Bromus hordeaceus – Soft-brome) and folded vernation (e. g. in Dactylis glomerata – Cocksfoot).