What is the purpose of petals and sepals?
What is the purpose of petals and sepals?
The initial function of sepals is to provide support and protection for a flower bud as they close up around it until it’s ready to bloom. The sepals surround the petals and the reproductive organs inside the flower and protect them from harsh environmental conditions and drying out.
When the sepals and petals can’t be distinguished in a flower are called?
Tepals or undifferentiated Perianth segments, occur when a difference cannot be discerned between the petals and the sepals. Examples of this are tulips, amaryllis, lilies and orchids.
What is the role of sepals in a flower?
The sepal is a defensive organ that encloses and protects the developing reproductive structures. At maturity, the sepal opens when the flower blooms.
What is the difference between petals and sepals?
The main difference between sepals and petals is that sepals are the green colour, leaf-like structures that form the outermost whorl whereas petals are the bright-colored petaloid structures which form the inner whorl. Sepals and petals are two non-reproductive structures in a flower.
What does bract mean?
1 : a leaf from the axil of which a flower or floral axis arises.
What is a Petaloid?
Petaloid flowers: Petaloid means when sepals resemble petals, e.g, Lily, Anemone, Hellebore flowers etc. However, some flower like that of Amborella, Trimenia have green petals that resemble sepals. Thus can be considered as an example sepaloid flower.
What is inflorescence and its types?
The inflorescence is defined as the arrangement of a cluster of flowers on a floral axis. The inflorescence is of two types, they are: Racemose and Cymose.
What are the two main types of inflorescence?
- Types of Inflorescence (Floral structure)
- Spike – an elongate, unbranched, indeterminate inflorescence with sessile flowers.
- Spikelet – a small spike, characteristic of grasses and sedges.
- Raceme – an elongate, unbranched, indeterminate inflorescence with pedicelled flowers.
- Panicle – a branched raceme.
What are two major inflorescence types?
It is of the following types: Uniparous cyme/Monochasial cyme: The peduncle ends in a flower producing lateral branch at a time It is of two types again: Helicoid cyme and Scorpioid cyme. Dichasial or biparous cyme: In this type, peduncle ends in a flower and from the basal part of peduncle, two lateral branches arise.
What is the difference between inflorescence and flower?
Note:Flower is a modified shoot with specific nodes and internodes. It is the reproductive organ in angiosperms. Inflorescence is a flower group present on the floral axis….Complete answer:
| Flower | Inflorescence |
|---|---|
| It is the specialized branch with limited growth. | It is the cluster of flowers arranged on the floral axis. |
What is inflorescence and its types Class 11?
The inflorescence A flower is a modified shoot wherein the shoot apical meristem changes to floral meristem. The arrangement of flowers on thefloral axis is termed as inflorescence. In cymose type of inflorescence, the main axis terminates in a flower; the flowers are borne in a basipetal order.
What are the main types of inflorescence?
Types of Inflorescence:
- Raceme: When peduncle bears many pedicellate flowers in an acropetal manner, e.g., Delphiniumajacis, Veronica, etc.
- Spike: A raceme with sessile flowers, e.g., Adhatoda vasica, Callistemon, etc.
- Spikelet:
- Panicle:
- Catkin:
- Spadix:
- Corymb:
- Umbel:
What is Polychasial cyme?
Polychasial Cyme: It is also called a multiparous cyme because multiple branches arise at the base of the apical flower on the peduncle. The oldest flower is placed in the middle of the axis. Example- Calotropis. 4. Cymose Capitulum: The peduncle is reduced to a circular disc in this type of inflorescence.
What is an example of Cymose inflorescence?
In this type of inflorescence, the young flower buds are at the bottom, and the older ones are at the top. Some cymose inflorescence examples are night jasmine, Drosera, common European elder etc.
What is meant by Actinomorphic flower?
Most flowers are actinomorphic (“star shaped”, “radial”), meaning they can be divided into 3 or more identical sectors which are related to each other by rotation about the centre of the flower. Actinomorphic flowers are also called radially symmetrical or regular flowers.
What is an example of Zygomorphic flower?
The examples of the zygomorphic flowers are orchids, the plants belong to the family Lamiales, the flowers belong to the family of fabaceae or the leguminosae. The plants like green pea, soybean, lentil, beans, chickpea, pigeon pea, mung bean, peanut etc. belong to the family fabaceae having zygomorphic symmetry.
What is meant by 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).
What is Bracteate flower?
Flowers with bracts (i.e. reduced leaf found at the base of the pedicel) are called bracteate flowers, and ebracteate flowers are the flowers without bracts.
What is the difference between bract and Bracteole?
a. Reduced leaf found at the base of the pedicel is called bract while leaf like structure present between bract and flower is called bracteole. b. Pedicie is the stalk of flower while peduncle is the stalk of inflorescence.
What does Bracteate mean?
Definition of ‘bracteate’ 1. (of a plant) having bracts. 2. archaeology. a fine decorated dish or plate of precious metal.
What is Tetramerous flower?
consisting of or divided into four parts. Botany. (of flowers) having the parts of a whorl arranged in fours or multiples of four.