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EXPLANATION OF THE PLATES. 
Pirate CCCCXCIV. PoruLus DELTOIDEA. 
. A flowering branch of the staminate tree, natural size. 
. A staminate flower with its scale, enlarged. 
A flowering branch of the pistillate tree, natural size. 
. A pistillate flower with its scale, enlarged. 
. Cross section of an ovary, enlarged. 
A stigma seen from above, enlarged. 
Portion of a branch with a leaf, natural size. 
. A winter branch, natural size. 
Piatt CCCCXCV. Porutus DELTOIDEA. 
. A fruiting branch, natural size. 
. A fruit with open valves, enlarged. 
. A seed, magnified. 
. Vertical section of a seed, magnified. 
. An embryo, magnified. 
