a. 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 or branch; -- often confounded with
interpetiolar, from which it differs essentially in meaning.
[拉]叶柄内的(指托叶、芽)