George Francis Atkinson - Botany for High Schools (1910):

Fig. 51. A. cross section of the stem of an oak tree thirty-seven years old, showing the annual rings. rm, the medullary rays; m, the pith (medulla). B, cross section of the stem of a palm tree, showing the scattered bundles.

banana tree: *slurred* hold my cocktail

…Is this what that one Anon was going on about?

-D