Stipule

Stipule

In botany, stipule (Latin "stipula": straw, stalk"Concise English Dictionary" Wordsworth Editions Ltd. 1994, ISBN 1-85326-328-1] ) is a term coined by Linnaeus which refers to outgrowths borne on either side of the base of a leafstalk (the petiole). A pair of stipules is considered part of the anatomy of the leaf of a typical flowering plant, although in many species the stipules are inconspicuous or entirely absent (and the leaf is then termed "exstipulate").

Stipules are morphologically variable and might appear as glands, scales, hairs, spines, or laminar (leaf-like) structures. A relationship exists between the anatomy of the stem node and the presence or absence of stipules. Most plants with "trilacunar" nodes have stipules; species with "unilacunar" nodes lack stipules (Sinnott and Bailey, 1914, cited in Esau, 1953).

Types of Stipules

References

Notes

General references

* Esau, K. 1953. Plant Anatomy. Second Edition. John Wiley & Sons, Inc., New York, London, Sidney. 767 pp.
* Sinnott, E. W. and I. W. Bailey. 1914. Investigations on the phylogeny of the angiosperms. 3. Nodal anatomy and the morphology of stipules. "Amer. J. Bot.",1: 441-453.

External links

* [http://www.botgard.ucla.edu/html/botanytextbooks/generalbotany/shootfeatures/generalstructure/stipules/index.html Stipules and stipels]


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  • stipule — [ stipyl ] n. f. • 1749; dimin. lat. stipula ♦ Bot. Chacun des deux organes foliacés insérés à la base du pétiole (d une feuille). ● stipule nom féminin (latin stipula, chaume) Chacune des deux petites expansions foliacées latérales de la feuille …   Encyclopédie Universelle

  • stipulé — stipule [ stipyl ] n. f. • 1749; dimin. lat. stipula ♦ Bot. Chacun des deux organes foliacés insérés à la base du pétiole (d une feuille). ● stipule nom féminin (latin stipula, chaume) Chacune des deux petites expansions foliacées latérales de la …   Encyclopédie Universelle

  • stipulé — stipulé, ée 1. (sti pu lé, lée) part. passé de stipuler. Les conditions stipulées dans l acte. stipulé, ée 2. (sti pu lé, lée) adj. Terme de botanique. Qui est muni de stipules.    Se dit des cuisses des insectes, lorsqu elles offrent, à leur… …   Dictionnaire de la Langue Française d'Émile Littré

  • Stipule — Stip ule, n. [L. stipula a stalk, stem, straw: cf. F. stipule. Cf. {Stubble}.] (Bot.) An appendage at the base of petioles or leaves, usually somewhat resembling a small leaf in texture and appearance. [1913 Webster] …   The Collaborative International Dictionary of English

  • stipule — small appendage at the base of the petiole of a leaf, 1793, from Fr. stipule, from L. stipula stalk (of hay), straw …   Etymology dictionary

  • stipulé — Stipulé, [stipul]ée. part …   Dictionnaire de l'Académie française

  • stipule — [stip′yo͞ol΄] n. [ModL stipula < L, a stalk, straw, dim. of stipes, trunk: see STIPE] either of a pair of small, leaflike parts at the base of some leaf petioles, as on a bean, pea, or rose plant …   English World dictionary

  • Stipule — Feuille d églantier (Rosa canina) portant une paire de stipules foliacées adnées (soudées au pétiole). En botanique, les stipules sont des pièces foliaires, au nombre de deux, en forme de feuilles réduites situées de part et d autre du pétiole, à …   Wikipédia en Français

  • stipule — [ stɪpju:l] noun Botany a small leaf like appendage to a leaf, typically borne in pairs at the base of the leaf stalk. Derivatives stipular adjective Origin C18: from Fr. stipule or L. stipula straw …   English new terms dictionary

  • stipule — n. a small leaflike appendage to a leaf, usu. at the base of a leaf stem. Derivatives: stipular adj. Etymology: F stipule or L stipula straw …   Useful english dictionary

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