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Flowers : Types 2 To know more about "The flowers" Pollination

Types of inflorescences

THE FLOWER: INFLORESCENCES

Flowers do not appear solitary in a stem. They are generally arranged in a fixed pattern we call inflorescence. Flowers included in the inflorescence are generally called florets. Inflorescences can be:

Single: when all the flowers are gathered in the same single pattern.

Compound: when a complex pattern is made of another single patterns.

 

Main single inflorescences

Raceme

Spike

Corymb

RAIM

ESPIGA

CORIMBE

Umbel

Head

 

RUMBELA

CAPITOL

 

- In racemes florets are attached along a floral peduncle with stems similar in length. Young florets appear above and old ones below.

- Spikes are inflorescences similar to racemes, but florets are attached directly to the floral peduncle,without stems.

(see image of a spike -Mint - Menta rotundifolia ) CAMERA

- In corymbs. all the florets are arranged along a floral peduncle but , differently to racemes, stems have different length in such a way that all the florets appear at the same flat round level.

- In umbels florets arise from the same point of the peduncle.

- In heads florets bearing no stem are gathered together on a platform-shaped peduncle. This is the inflorescence characteristic in the daisy family.

(See image of a head - Milkthistle-Sylibum Marianum) CAMERA


Main compound inflorescences

Panicle

Compound umbel

PANICULA

RUMBELA

- Panicles are formed by several racemes gathered together.

- Compound umbels are formed by several umbels gathered together.

TEST

Choose the correct answer:

MARGARITA

Which kind of inflorescence this daisy is?

- An umbel

- A head

- A spike

 

The flower above is an inflorescence...

- Compound?

- Special?

-Single?

Flowers : Types 2 To know more about "The flowers" Pollination









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