Complex sentence: In many cases the last true flower formed by the terminal bud (subterminal flower) straightens up, appearing to be a terminal flower but often a vestige of the terminal bud may be noticed higher on the stem.
Split into simpler sentences: In many cases the last true flower formed by the terminal bud (subterminal flower) straightens up, appearing to be a terminal flower. Often a vestige of the terminal bud may be noticed higher on the stem.