n, Node, part to which the leaf is fastened.
i, Internode, portion between nodes.
a, Axil, the angle between leaf and stem, upper side.
Class.—Exogenous, outside-growing (Maple, Elm).
Endogenous, inside-growing (Corn-stalk, Timothy).
Situation.—(1.) Above ground, usually leaf-bearing.
(2.) Under ground, scale-bearing.
Stems above Ground.
Character.—Herbaceous, soft, not woody (Four-o’clock).