PLATE IV.
Fig. 1—FOLIATION. TRANSVERSE SECTION OF A LEAF NOT YET UNROLLED, SHOWING THE TWO LONGITUDINAL JUTTINGS WHICH FORM THE FALSE NERVURES OF THE COCA LEAF.
- F. i., Lower surface.
- F. S., Upper surface.
- N. p., Principal nervure.
- F. n., False nervures.
Fig. 2—TRANSVERSE SECTION OF ONE OF THE JUTTINGS.
- E. s., Upper epidermis.
- E. i., Lower epidermis.
- F. n., False nervure.