In botany, stipule (Latin stipula: straw, stalk[1]) is a term coined by Linnaeus[1] which refers to outgrowths borne on either side of the base of a leafstalk (the petiole). Botany, plant science(s, phytology, or plant biology is a branch of Biology and is the scientific study of plant Life Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. Carl Linnaeus (Latinized as Carolus Linnaeus, also known after his ennoblement as, May 23 new style (13 May old style 1707 who laid the foundations for In Botany, the petiole is the small stalk attaching the Leaf blade to the stem. 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). In Botany, a leaf is an above-ground Plant organ specialized for Photosynthesis. The flowering plants or angiosperms ( Angiospermae or Magnoliophyta) are the most widespread group
Stipules are morphologically variable and might appear as glands, scales, hairs, spines, or laminar (leaf-like) structures. A gland is an organ in an animal's body that synthesizes a substance for release such as Hormones or Breast milk, often into the Bloodstream Trichomes, from the Greek meaning "growth of Hair " are fine outgrowths or appendages on Plants and certain Protists These are of diverse Spines are leaves that have been modified into cylindrical hard structures with sharp ends 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). A stem is one of two main structural axes of a Vascular plant.
 Leafy stipules at the base of a Rose leaf (Rosa canina) |
 Stipular spines accompanied by prickles of Euphorbia didieroides |
 Stipular spines on the mesquite tree (Prosopis pallida) |
 Glandular stipule of Euphorbia pteroneura |
 Stipules protecting young leaves of Carpinus betulus (European Hornbeam) |
 Fused together and leaf-like stipules of Alchemilla mollis |
 Stipules building glandular hairs on Jatropha spicata |
 Stipular spine clusters of Euphorbia spectabilis |
Contents |
References
Notes
- ^ a b Concise English Dictionary Wordsworth Editions Ltd. A rose is a perennial flowering Shrub or vine of the Genus Rosa, within the family Rosaceae, that contains over 100 species Rosa canina (lit Dog Rose, often called incorrectly Rosehip) is a variable scrambling Rose species native to Europe Euphorbia is a Genus of Plants belonging to the family Euphorbiaceae. Mesquite (from Nahuatl mizquitl) is a leguminous plant of the Prosopis genus found in Northern Mexico and the United Prosopis pallida (syn Prosopis limensis) is a species of Mesquite tree Carpinus betulus ( European or common hornbeam) is a Hornbeam native to western central and southern Europe, extending eastward Alchemilla mollis, Lady's Mantle, is an Herbaceous perennial plant native to southern Europe, but grown throughout the world as an ornamental 1994, ISBN 1-85326-328-1
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
Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic