Nomenclature and Anatomy of Flowers - PowerPoint PPT Presentation

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Nomenclature and Anatomy of Flowers

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  1. Nomenclature and Anatomy of Flowers Modified by Georgia Agriculture Education Curriculum Office June 2002

  2. A complete flower has 4 parts present • sepals • petals • stamens • pistils

  3. Sepal • One of the outermost flower structures • Commonly small, green, leaflike structures • When the sepals and petals appear the same (such as lilies), they are called tepals • Collective word for sepals and petals is called perianth

  4. Petals • Usually conspicuously colored • Collectively called the corolla • Normally positioned between sepals and inner flower parts

  5. Stamens • Threadlike extensions that stand upright from the perianth • Male reproductive parts of a flower • Consists of the anther and the filament

  6. Pistils • Female reproductive parts of a flower • Consists of the stigma, style, and ovary

  7. Types of Flower Structure • Solitary • Inflorescence

  8. Solitary Flowers • Flowers that form singly on upright stalks • Ex: tulips, roses, daffodils

  9. Inflorescence • A flower that is made up of several florets • Flowers have a branching pattern from the main stem • The main stalk of an inflorescence is a peduncle, stalks that support the florets are called pedicels

  10. Types of Inflorescence Spike: • Has an elongated inflorescence on the main stem. • Ex: liatris, gladiolus

  11. Types of Inflorescence Raceme: • Similar to a spike except florets aren’t directly attached to the stem • Ex: delphinium

  12. Types of Inflorescence Corymb: • Has a flat top or slightly convex shape • Has main stem with pedicels of unequal length • Ex: yarrow

  13. Types of Inflorescence Cyme: • Broad and flat topped • Has divisions that arise below a terminal flower • Ex: Bird of Paradise

  14. Types of Inflorescence Umbel: • Flower cluster that is easily recognized • Simple umbel has single pedicelled flowers all arising from the top of the main stem. Ex: agapanthus • Compound umbel has secondary umbels arising from main stem. Ex: Queen Anne’s Lace

  15. Types of Inflorescence Spadix: • Thick flower spike surrounded by a conspicuous bract. • The spathe (bract) is often mistakenly identified as the flower • Ex: Anthurium

  16. Types of Inflorescence • Slender , scaly-bracted inflorescence found on woody plants • Ex: Willow, alder, birch Catkin:

  17. Types of Inflorescence Head Flower: • Short, dense cluster of flowers in a flat pattern • Ex: sunflowers

  18. Leaf Parts • Blade • Petiole • Stipules

  19. Leaf Types • Simple leaf: leaf with a single blade • Compound leaf: leaf with more than one blade (leaflets)

  20. Leaf Vein Patterns • Vein patterns in leaf blades are called venation • Types • parallel • palmate • pinnate

  21. Leaf Shapes • Basic outline of the blade make up the shape of the leaf • Ex: oblong, linear, pelate, elliptic

  22. Leaf Margins • Edge of the leaf blade is called a margin • The appearance of the margin can affect the texture of a design • Ex: entire, undulate, serrate, lobed