a. types

-terminal
-pseudoterminal
-lateral
-superposed (more than one bud per leaf axil)
-floral
-vegetative
-mixed

b. covering

-naked
-scaly

-imbricate
-valvate
-single, cap-like scale

a. solid

-homogeneous
-diaphragmed (alternating dark and light layers)

b. chambered
c. hollow