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Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
Inflorescence
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Inflorescence

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  • 1. Inflorescence
  • 2. Inflorescence• An inflorescence may be defined as a cluster of flowers,• all flowers arising from the main stem axis or peduncle:
  • 3. cyme
  • 4. • Solitary just one flower on the peduncle
  • 5. • Spadix - is the characteristic inflorescence of the remarkable arum family (Araceae). - It consists of a thickened, fleshy axis (spike) bearing clusters of sessile, apetalous, unisexual flowers. - The small unisexual flowers are packed together along the lower region of an erect, phallus-like central spike, typically with male flowers above the female. - The upper region of the spadix is usually devoid of flowers. - Male (staminate) flowers consist of numerous stamens packed together,
  • 6. - while female (pistillate) flowers consist of numerous individual pistils. - Individual flowers are reduced to a single stamen or pistil (gynoecium). - The spadix emerges from a vase- shaped or funnel-like modified leaf or spathe which is often brightly colored. - The spadix of some arums emits a putrid odor that attracts carrion flies for pollination.
  • 7. • Raceme - This inflorescence has an unbranched main axis and all the pedicels of the flowers are more or less the same length.
  • 8. Other RacemeSweet pea (Lathyrus odoratus) Chinese hat (Holmskioldia sp.)
  • 9. • Umbel - The peduncle of this type of inflorescence bears all of the pedicels at its apex.Hydrangea (Hydrangeamacrophylla) Lantana (Lantana sp)
  • 10. • Compound Umbel - The peduncle bears a number of primary pedicels at its apex. These do not bear flowers but a number of secondary pedicels at their apices which in turn bear the flowers. Frangipani (Plumeria rubra)
  • 11. • Spike - This inflorescence type has a long, unbranched main axis which bears flowers which have no pedicels or very short Silver oak (Grevillea robusta) pedicels.
  • 12. Quiver tree (Aloe dichotma) Red hot pokerGladiolus (Kniphofia sp.)(Gladiolus sp.)
  • 13. • Head (capitulum) - which do not have pedicels - are grouped together on the top of a peduncle which may be flattened or rounded. - Daisies (Asteraceae) are a good example - outer flowers may have one very large petal - In other families the whole inflorescence may be surrounded by bracts e.g. the Proteas. - This gives the impression that the whole structure is a single flower but it may infact be hundreds of flowers grouped together.
  • 14. Examples: King protea (Protea Daisy species cynaroides)
  • 15. Mimosa sp. Pincushions (Leucospermum sp.)
  • 16. • A Corymb - The main axis of this inflorescence type is elongated and unbranched as in a raceme, but the pedicels of the flowers are of unequal length so that the entire structure appears flat-topped. Examples include hawthorn, the apple and Crataegus calpodendron dogwood.
  • 17. Hydrangea corymb (group ofHawthorn flowers displayed as a disc)
  • 18. Difference of corycomb, cyme andumbel
  • 19. • Spikelet -likea spike, but with the flowers and inflorescence subtended by specialized bracts. Usually applied to the grass family (Poaceae)
  • 20. • Verticil or Whorl-- The flowers are borne in a tight circle at each node
  • 21. • PanicleThe mainaxis hasbrancheswhich are inturnrebranched
  • 22. Inflorescence Types

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