METAPHANIC VARIATIONS OF HICKORY LEAVES 



Figure 9. Late shoot of hickory, developed in partial shade at Lanham, Mary- 

 land, in August, 1922, with expanded bud-scales functioning as leaves. A series of 

 eight internodes producing intermediate forms of leaves, followed by eight shorter 

 internodes with somewhat enlarged bud-scales, at the end a young leaf of the normal 

 compound form, with only the lowest pinnae expanded. The last bud-scale, standing 

 nearly erect, is somewhat more leaf-like than the others, showing a larger blade 

 rudiment and having the lateral wings of the base produced above into diverging 

 stipule-like organs, which also ajppear in more rudimentary form on the smaller or 

 more normal bud-scales. The leaves have winged bases like the bud-scales, and some 

 of the wings are produced above into small, delicate, transparent, stipule-like ap- 

 pendages, closely similar to those of the bud-scales, while other leaves show larger 

 stages of development of the stipular appendages, including broad pinnae not unlike 

 those of the normal com'pound leaves. (Natural size). 



