Fig. 78. Butternut branch, with accessory buds, the uppermost above the axil.
Fig. 79. Red-Maple branch, with accessory buds placed side by side. The annular lines toward the base in this and in Fig. [72] are scars of the bud-scales, and indicate the place of the winter-bud of the preceding year.
[60.] Sorts of Buds. It may be useful to enumerate the kinds of buds which have been described or mentioned. They are
Terminal, when they occupy the summit of (or terminate) a stem,
Lateral, when they are borne on the side of a stem; of which the regular kind is the
Axillary, situated in the axil of a leaf. These are
Accessory or Supernumerary, when they are in addition to the normal solitary bud; and these are Collateral, when side by side; Superposed, when one above another;
Extra-axillary, when they appear above the axil, as some do when superposed, and as occasionally is the case when single.
Naked buds; those which have no protecting scales.
Scaly buds; those which have protecting scales, which are altered leaves or bases of leaves.