Interpetiolar (of stipules).
Stipule present between the petioles (as stipule sheathing the terminal bud).
Intrapetiolar (of stipules).
Situated between the petiole and the stem; -- said of the pair of stipules at the base of a petiole when united by those margins next the petiole, thus seeming to form a single stipule between the petiole and the stem.