dd. Cup of acorn saucer-shaped, inclosing only the base of the

nut.

e. Upper surface of leaves usually lustrous, especially on the lower branches; lowermost branches of trees growing in the open drooping nearly to the ground; nut about 1/2 inch long _Q. palustris_, p. 111.

ee. Upper surface of leaves usually dull; lowermost branches of trees growing in the open not drooping; nut about 1 inch long. _Q. rubra_, p. 109.

bb. Leaf-lobes rounded, not bristle-tipped; fruit maturing in the first season.