LEAF. Simple, sessile, feather-veined, entire, lanceolate; stipule, ochreate. The question, Parts? is now dropped, because it is answered in giving the position of the leaves. To say that leaves are cauline is to say that the stem is composed of both nodes and internodes, while, if the stem has radical leaves only, there are no internodes. NOTE. When the nodes of a stem are distinctly jointed, when they are swollen and watery (tumid), when they are hairy, or when of a different color from the internodes, they give a peculiar aspect to the plant, and pupils should be en ALTERNATE LEAVES.-Leaves are alternate on the stem when there is but one at each node, as in Fig. 123. couraged to record such facts upon the schedule. Very long or very short internodes, and other noticeable peculiarities, should OPPOSITE LEAVES.-When two leaves grow opposite each other, we call it the opposite arrangement. Fig. 124. FIG. 125. Whorled Leaves. WHORLED LEAVES.-When there are more than two leaves at a node, we say the leaves are whorled. be stated. A word or two at the bottom or back of the schedule, as, nodes tumid, or, internodes very long, is all that is requisite. Brevity and precision of statement should always be insisted upon. THE LEAF.-Sessile, feather-veined, serrate, lanceolate. NOTE.-Leaf-position and leaf-arrangement pertain as much to the leaf as to the stem, but observations concerning them could not be properly made until something was known of the stem. When the pupil becomes familiar with these characters, it will, perhaps, be more appropriate to notice them in the leaf-description than in the stem-description. |