Leaf Characteristics of Ginkgo biloba L.

In this paper, the ginkgo leaves in different shoots were investigated. The leaf width, petiole length and basal angle were spurshort shootlong shoot; the leaf length, leaf index were long shootshort shootspur; the leaf area was spur=short shootlong shoot; the ratio of lobation was long shootspurshort shoot. In long shoot, the leaf width, leaf length, leaf area, petiole length and basal angle decreased, but the leaf index and the ratio of lobation increased as its arrangement increased. In short shoot and spur, the leaves got longer, wider and bigger as leaf arrangement increased, the fifth or sixth leaf was the longest and widest, and its area was biggest, after the fifth or sixth arrangement the leaves got shorter, narrower and smaller as arrangement increased, the leaf index and the petiole length increased, but the basal angle decreased as arrangement increased. The second leaf in long shoot, the fourth leaf in spur and short shoot had the smallest coefficient of variation (c.v) in the investigated leaves, indicated these leaves may be used as standard leaves.