Scheme of description of angiospermic families and technical terms of flowers

Technical Terms of Flowers'


For angiospermic families of plants



  1. Bracteate: If bract is presently called bracteate.

  2. Ebracteate: If bract is absent called ebracteate.

  3. Pedicillate: Presence of pedicel. 

  4. Sessile: Absence of pedicel.

  5. Monosexual: When stamen or carpel one of both is present.

  6. Bisexual: When both stamen and carpel are present.

  7. Complete: Presence of both calyx and corolla.

  8. Incomplete: One of the calyx or corolla is absent.

  9. Hermaphrodite: Both male and female sex organs present on the same plant. OR we can say that both stamen and carpel are present.

  10. Actinomorphic: When a flower can be cut or divided into two equal halves by more than one plane or axis, it is called actinomorphic.

  11. Zygomorphic: When a flower can be divided into two equal halves by only one plane called zygomorphic.

  12. Regular: When symmetry is Actinomorphic.

  13. Irregular: When symmetry is zygomorphic.

  14. Hypogynous: When the ovary is superior.

  15. Perigynous: When the ovary is inferior.

Calyx (Sepals)



  1. Gamosepalous: Sepal fused

  2. Polysepalous: Sepal or calyx free

  3. Persistent sepals: If sepals don't fall after the opening of the flower are known as persistant sepals.

Corolla (Petals)



  1. Gamopetalous: the fused condition of petals called gamopetalous.

  2. Polypetalous: free petals.

Perianth


This term is used when sepals and petals cannot be differentiated from each other.

Stamen (androecium)



  1. Polyandrous: stamens free.

  2. Epipetalous stamen: Stamens are attached to petals.

  3. Adelphous: Stamens are fused by their filaments.

  4. Monadelphous: The filaments of stamens fused to form a single group.

  5. Basifixed: Stamen attached at the base of anther.

  6. Versatile: filament attached at the back of anther.

Carpel (gymnasium)



  1. Apocarpous: Carpel free

  2. Syncarpous: carpel fused

  3. Monocarpellary: single carpel

  4. Polycarpillary: Many carpels

  5. Simple pistil: carpels are not fused

  6. Compound Pistel: one or more than one carpels are fused

  7.  Unilocular ovary: Ovary has a single chamber

Placentation


The attachment of ovule in the ovary. It is term as placentation.

Types


it has different types:

  1. Basal: ovule is attached to the base of the ovary.

  2. Axile: In this case, there is a central axil rod-like inside the ovary. The ovule attached on this axil.

  3. Marginal: Ovule is attached to the inner wall of the ovary.

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