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EXPLANATION OF THE PLATES. 
Puate LXVII. AcscuLus GLABRA. 
A flowering branch, natural size. 
. A winter-bud. 
Diagram of a flower. 
. Vertical section of a staminate flower, enlarged. 
. Vertical section of a pistillate flower, enlarged. 
. A lateral petal, enlarged. 
A superior petal, enlarged. 
. A stamen, front and rear view. 
. A pistil, cut transversely, enlarged. 
. Vertical section of an ovary, enlarged. 
. An ovule, much magnified. 
Puate LXVIII. Ascutus GLABRA. 
. A fruiting branch, natural size. 
A half-grown fruit, natural size. 
. A fruit with a portion of two of the valves removed, natural size. 
A seed, natural size. 
. Vertical section of a seed, natural size. 
. An embryo, natural size. 
