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 CHAPTER XI

LEAVES—FORM AND POSITION

Leaves may be studied from four points of view,—with reference (1) to their kinds and shapes; (2) their position, or arrangement on the plant; (3) their anatomy, or structure; (4) their function, or the work they perform. This chapter is concerned with the first two categories.

(a common fern).

Kinds.—Leaves are simple or unbranched (Figs. 88, 89), and compound or branched (Fig. 90).