Stipule

In botany, a stipule is an outgrowth typically borne on both sides (sometimes on just one side) of the base of a leafstalk (the petiole). Stipules are considered part of the anatomy of the leaf of a typical flowering plant, although in many species they may be inconspicuous —or sometimes entirely absent, and the leaf is then termed exstipulate. (In some older botanical writing, the term "stipule" was used more generally to refer to any small leaves or leaf-parts, notably prophylls.)^[1] The word stipule was coined by Linnaeus^[2] from Latin stipula, straw, stalk.

^ Goebel, K.E.v. (1969) [1905]. Organography of plants, especially of the Archegoniatae and Spermaphyta. Vol. Part 2 Special organography. Translated by I.B. Balfour. New York: Hofner publishing company.
^ Concise English Dictionary Wordsworth Editions Ltd. 1994, ISBN 1-85326-328-1

[1] Goebel, K.E.v. (1969) [1905]. Organography of plants, especially of the Archegoniatae and Spermaphyta. Vol. Part 2 Special organography. Translated by I.B. Balfour. New York: Hofner publishing company.

[CED-2] Concise English Dictionary Wordsworth Editions Ltd. 1994, ISBN 1-85326-328-1

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