As a result, it is referred to as an indefinite or indeterminate inflorescence in some circles.It is referred to as a compound raceme or panicle when the main axis of the inflorescence has been branched and the flowers on the lateral branches are arranged in a simple raceme fashion on the branches.
For example, Mangifera indica (mango), Azadirachta indica (neem), Delonix regia (Gulmohar), and other plants are cultivated worldwide.
Inflorescence is a term used to describe a flower.
The apex of a plant produces a variety of floral appendages at each node along its branching path. An inflorescence is a flower arrangement that is arranged along the floral axis of the plant. Based on whether or not the apex of the inflorescence continues to grow, there are two varieties of inflorescence.
Inflorescences are classified into several categories.
Racemose – In this species, the blooms are held laterally in an acropetal succession, while the main axis of the plant continues to develop.
Cymose – The primary axis of this plant finishes in a bloom here. As a result, the potential for expansion is limited.
Florescences of various kinds are also found.
Racemose and Cymose are the two most common forms of inflorescence. The remaining special types are as follows:
Cymose or racemose inflorescences are produced by the principal stem branching once or twice in a compound inflorescence.
Cyathium – It has a very small inflorescence compared to other species. It has a cup-shaped involucre generated by the fusion of five bracts, which is a characteristic of the species.
Hypanthodium – This element has a flask-shaped receptacle that forms a hollow cavity in the centre. Aside from that, it possesses terminal pores that are encircled by scales.
Verticillaster – This is a form of inflorescence that is only found in the Lamiaceae family. It is a condensed type of a dichasial cyme with blooms that are either sub-sessile or sessile in shape.
The following are the primary characteristics of the racemose inflorescence:
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Flower buds are produced indefinitely by the main axis (peduncle), which continues to grow indefinitely as well.
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A flower is rarely produced near the end of a peduncle.
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The peduncle is monopodial in shape.
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The initial flowers appear toward the base of the peduncle, where they remain for a long time.
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Flowers are borne laterally in acropetal succession, which means that older flowers are at the base of the plant and younger flowers are at the tip of the plant.
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A group of flowers is arranged centripetally, with the youngest blooms in the centre and the oldest flowers towards the periphery of the arrangement.
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Flowers do not provide protection to newly developed fruits.
Florets
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Florets are sessile and grouped in a centripetal fashion, which means that the outside flowers are older and the interior blooms are younger, as shown in the illustration.
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Individual florets are bracketed in appearance.
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It is possible to see one or more whorls of bracts covering the entire inflorescence (involucre)
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Florets can be unisexual, bisexual, or sterile, depending on the species.
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Florets are divided into two types: ray florets with strap-like shapes and central tubular disc florets with a tubular shape.
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Heterogamous florets are those that have two different types of florets in the same capitulum.
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A capitulum is considered homogamous if all of its flowers are identical to one another.
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Examples include: Helianthus annuus (Sunflower), Zinnia, Tagetes erecta (Marigold), Cosmos, Mimosa pudica, Acacia, and many more flowers and plants.
Conclusion
‘A racemose is a type of inflorescence characterised by the fact that the main axis grows continuously and does not culminate in a flower’.As a result, it is referred to as an indefinite or indeterminate inflorescence in some circles.It is referred to as a compound raceme or panicle when the main axis of the inflorescence has been branched and the flowers on the lateral branches are arranged in a simple raceme fashion on the branches.