The Plant World. 



Vol. VI, Plate 3. 



Fig. I. 



His 



Fig. 5. 



Collins on Dimorphism in Ginkgo Shoots. 



Fig. 1— Branch showing alternate periods of rapid growth and dormant condition. Fig. 2 — 

 " Rapidly growing shoot, part of one year's growth. Fig. 3— Dormant shoot of ten to 

 tifteen years' growth. All very slightly reduced from natural size. 



