What is inflorescence in a flower?
Inflorescence, in a flowering plant, a cluster of flowers on a branch or a system of branches. An inflorescence is categorized on the basis of the arrangement of flowers on a main axis (peduncle) and by the timing of its flowering (determinate and indeterminate).
Why do flowers have different inflorescences?
Selective influences on the floral display vary with the pollination system, and within a pollination system with the specific actions of the pollen vector. Inflorescence function is thus something that occurs in specific taxa, on a specific temporal scale, and with specific pollen vectors.
What are the major types of inflorescence in flowering plants?
Types of Inflorescence
- Racemose Inflorescence. In this type of inflorescence, the flowers branch laterally on the floral axis.
- Cymose Inflorescence. In this type of inflorescence, the flower is the terminating point of each floral axis.
- Compound Inflorescence.
- Cyathium.
- Verticillaster.
- Hypanthodium.
- Hypogynous.
- Perigynous.
What are the main types of inflorescence?
There are many inflorescence types, but the following are some of the most commonly encountered.
- Head (also called a capitulum). Florets are clustered on an enlarged receptacle.
- Umbel. Pedicels converge on a single point, where they attach to the peduncle.
- Spike.
- Raceme.
- Panicle.
What are the two major types of inflorescence?
The inflorescence is the term given to the arrangement of a group of flowers around a floral axis. There are two types of inflorescence – Racemose and Cymose.
What is Polychasial cyme?
Polychasial cyme: It is known as multiparous cyme. Multiple branches arise at the base of the apical flower on the peduncle. The oldest flower is in the middle. E.g Calotropis. Cymose capitulum: In this type of arrangement the peduncle is reduced to a circular disc.
What is Epigynous condition?
The condition in which the sepals, petals and stamens are separately and successively inserted above the ovary is called as epigynous condition. In this condition, ovary is inferior.
Which is called raceme of cymes?
A raceme in which the single flowers are replaced by cymes is called a (indefinite) thyrse. The secondary cymes can be of any of the different types of dichasia and monochasia. A botryoid in which the single flowers are replaced by cymes is a definite thyrse or thyrsoid.
In which plant is Cymose inflorescence?
Solanaceae
What is Hypogynous flower?
In hypogynous flowers, the perianth and stamens are attached to the receptacle below the gynoecium; the ovary is superior to these organs, and the remaining floral organs arise from below the point of origin of the carpel. …the pistil; such flowers are hypogynous (e.g., buttercup and magnolia).
Is half inferior in Flowers of?
Ovary is half-inferior in the flowers of plum. A half-inferior ovary is embedded or surrounded by the receptacle. Such flowers are termed perigynous or half-epigynous. In some classifications, half-inferior ovaries are not recognized and are instead grouped with either the superior or inferior ovaries.
What is Basipetal order?
It is a modified form of cymose inflorescence. Here, new flowers are placed at the bottom, and the relatively older flowers are placed at the top. Basipetal order is clearly visible in biparous and multiparous cymose inflorescences. Basipetal order is the opposite arrangement of acropetal order.
What is the difference between acropetal and Basipetal order?
Acropetal order is the arrangement of new flowers at the apex and older flowers at the base. In contrast, basipetal order is the flower arrangement in which older flowers are present at the apex while new flowers are present at the base. So, this is the key difference between acropetal and basipetal order.
What is difference between Basipetal and acropetal?
The main difference between acropetal and basipetal is that acropetal is the development, maturation or opening, in sequence, from the base towards the apex, whereas the basipetal is the development, maturation or opening from the apex towards the base in the sequence.
What is meant by acropetal and Basipetal order?
Acropetal order(modified form of racemose inflorescence)refers to the arrangement of flowers on the pedicel that the new flowers and buds are at the apex and the older flowers are at the base whereas vice-versa is for basipetal order which is a modified form of cymose inflorescence (i.e new flowers are at the bottom …
What is a Basipetal movement?
basipetal movement Movement of substances towards the basal region of the plant from the root and shoot apices.
What is Basipetal maturation?
bā-sĭpĭ-tl, -zĭp- Of or relating to the development or maturation of tissues or organs or the movement of substances, such as hormones, from the apex downward toward the base.
Which inflorescence flower is produced in acropetal order?
This type of inflorescence is also known as ‘Racemose inflorescence’. Complete answer: Acropetal succession in a plant is defined as the growth of the floral component from base to the apex.
Which flower is called neutered flower?
Neuter flowers have undeveloped or nonfunctional sexual organs. They have pistils and stamens that are nonfunctional or absent. The flowers are androgynous and the plants reproduce asexually. Ray florets of sunflower are neuter flowers, disc florets are bisexual, also in some more Asteraceae, e.g. Centaurea.
What is acropetal succession in biology?
The racemose inflorescence is characterized by acropetal succession which means that the newly developing and young buds and flowers are arranged at the top and the older buds and flowers are found to be present at the bottom of the plant.