Which preposition to use with stipules

of Occurrences 3%

[Footnote 1: See the stipules of the Pea, p. 31.]

at Occurrences 1%

I did not tell them that the way to tell a single leaf was to look for buds in the axils, but incautiously drew their attention to the stipules at the base of a rose leaf as a means of knowing that the whole was one.

without Occurrences 1%

In the Beech, the scales are also stipules; but, whereas in the Magnolia there are only one or two abortive leaves, in the Beech there are eight or nine pairs of stipules without any leaves at all.

Which preposition to use with  stipules