TEM MORPHOLOGY terminal bud a bud at the tip of a stem responsible for terminal growth. axillary bud or lateral bud buds along side the axis of a stem; once they grow and form a stem they become terminal buds. flower bud a bud containing the floral meristem which develops into flowers leaf scar a scar marking the former point of attachment of a leaf or petiole to the stem. node part of the stem marking point of attachment of leaves, buds and other stems. internode the part of the stem between the nodes. lenticel rough areas on stems (and some fruits, ex. apple) where loosely packed cells extend from the cortex through the ruptured epidermis; they function as breathing pores for gas exchange. growth ring bud scale scars from the last terminal bud.  Can be used to age stems. bud an underdeveloped and unelongated stem composed of a short axis with compressed internodes , a meristematic apex, and primordial leaves and/or flowers.