Question

If the petals of a flower are joined together, then the pistil is joined to the petal. Correct the following statement and rewrite it.

Answer 1

This statement is related to the conditions of the flower when any of the four whorls, namely, Calyx, Corolla, Androecium and Gynoecium are united with one another. The members of the calyx are known as sepals. The members of corolla that constitute the floral parts are known as petals. The pistil is the female reproductive part of a flower. Now their united conditions along with the terminology used to denote such unity is discussed below.

Complete answer:
If the petals of a flower are joined together, then the pistil may or may not be joined to the petals.
Let us discuss each whorl one by one.
CALYX:
members- sepals
condition where the sepals are united- gamosepalous
condition where the sepals are free- polysepalous
COROLLA:
members- petals
condition where the petals are united- gamopetalous
condition where the petals are free- polysepalous
Corolla may be tubular, bell-shaped, funnel-shaped or wheel shaped in nature.
PERIANTH: CONDITION WHERE THE SEPALS AND PETALS ARE UNITED AND CALYX AND THE COROLLA REGION CANNOT BE DISTINGUISHED SEPARATELY. Example- Tulips.
ANDROECIUM:
members- stamens; which may be divided into anther and filament.
Now the stamens may be of two types:
Adhesive Stamens: Those stamens which are united with the petals or other parts of the flower.
Epipetalous: Stamens attached to petals. E.g., Brinjal
Epiphyllous: Stamens attached to perianth. E.g., Lily
Cohesive Stamens: The stamens of a flower may also be united with each other.
Monadelphous: Stamens united in a bunch. E.g., China rose
Diadelphous: Stamens united in two bunches. E.g., Pea
Polydelphous: Stamens united in more than two bunches. E.g., Citrus
GYNOECIUM:
members- Carpel; which is further divisible into stigma style and ovary.
condition where the carpels are free- Apocarpous
condition where the carpels are fused- Syncarpous

Note:
Thus, now it should be clear to you that the association of petals in a flower does not necessarily mean that the pistils, or even the stamens will be attached to the petals. In fact, association of pistils with the petals of a flower is very rare. Most of the time it is noticed that stamens are attached to the petals of the flower.
Sometimes, there is a variation in the length of the filaments within a flower, as observed in certain plants like Salvia and Mustard.