EXPLANATION OF PLATE VIL 



[Figures natural size, except where otlierwsi- noted.] 



Fig. n, germinating seed; b, young seedling (early spring) with the 8 cotyledons just iiuColded; c, seedling a 



few weeks older, showing central cluster of primary leaves .jnst unfolding; cl, seedling at the end of the first or 



beginning of the second season, showing bundles of true foliage (secondary) leaves succeeding the primary leaves 



which have disappeared ; e, young tree, 3 to 4 years old, with characteristic large root system ; one-third natural size. 



