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Flowers

Flowers . Numerical plan and forms Original by Libby Astrachan Modified by Georgia Agriculture Education Curriculum Office - July 2004. Numerical parts of flowers. Most flowers have a definite number of parts. The best place to check is the petals or the sepals. . Monocots.

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Flowers

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  1. Flowers Numerical plan and forms Original by Libby Astrachan Modified by Georgia Agriculture Education Curriculum Office - July 2004

  2. Numerical parts of flowers • Most flowers have a definite number of parts. • The best place to check is the petals or the sepals.

  3. Monocots • Monocots have parts in 3’s or multiples of 3’s

  4. Dicots • Dicots have parts in 4’s or 5’s or multiples of 4’s or 5’s

  5. Forms of Flowers • Flowers are presented on stems in 2 different ways: solitary, or as inflorescences

  6. Solitary flowers • Single flower on a stem

  7. Inflorescence • Clustered flowers • Different types of inflorescences are based on how the stems are branched

  8. Peduncle • The main stem of an inflorescence

  9. Pedicels • Branch off the peduncle

  10. Inflorescences can be classified based on the order of flowering of the peduncle

  11. Determinate Flowers • Begin flowering from the top down (or out)

  12. Indeterminate Flowers • Begin flowering from the bottom (the base) and progress upward or inward

  13. Inflorescence types

  14. Spike • Elongated inflorescence • Central axis • Sessile flowers (no pedicels)

  15. Raceme • Elongated inflorescence • Central axis • Simple pedicels of more or less equal length

  16. Panicle • Elongated in florescence • Central axis • Branches that are themselves branched

  17. Corymb • Flat-topped • Main vertical axis • Pedicels or branches unequal length

  18. Umbel • Several branches arising from a common point • Simple umbel has flowers with single pedicels • Compound umbel has secondary branching

  19. Spadix • Spike with a thickened, fleshy axis, enveloped by a showy bract • Bract is called a spathe

  20. Catkin • Unisexual flowers with petals falling as a unit • Wind pollinated

  21. Head or Composite • Rounded of flat-topped cluster of sessile flowers

  22. Head or Composite • Many flowers have disc flowers, circled by ray flowers

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