From the May 10, 1930, issue

CANNON-BALL TREE

The strange growth represented on the cover of this issue of the SCIENCE NEWS-LETTER is not a freak grapefruit tree. It is the normal method of flowering and fruiting of the cannon-ball tree, a member of the monkey-pot family found in the forests of South America. Its fruiting branches always grow out of the lower part of the tree–a scheme that might well have been adopted by other trees that burden themselves with heavy fruits.