Stipule

At the other end of the scale are species like Artocarpus elasticus where the stipules can be up to eight inches (twenty cm) in length.

(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.

[3] Stipules are morphologically variable and might appear as glands, scales, hairs, spines, or laminar (leaf-like) structures.

[5] Stipules can be considered free lateral, adnate, interpetiolar, intrapetiolar, ochreate, foliaceous, bud scales, tendrillar or spiny.

A stipule is "adnate" if it's fused together on part of the petiole length, but the anterior is still free.

A stipule is considered "tendrillar" if they are long thin tendrils, and are generally used by climbing plants.



Glandular stipule of Euphorbia pteroneura


Stipular spines on the mesquite tree ( Prosopis pallida )


Fused together and leaf-like stipules of Alchemilla mollis


Leafy stipules at the base of a Rose leaf ( Rosa canina )


Stipules building glandular hairs on Jatropha spicata


Stipules protecting young leaves of Carpinus betulus ( European Hornbeam )


Stipular spine clusters of Euphorbia spectabilis


Stipular spines accompanied by prickles of Euphorbia didiereoides


The stipule of Ficus religiosa . The white "stipule" contains a new leaf and a new "stipule".