Question

#Challange

we know very well that solanacea(Tomatoe,brinjal etc) family have persistent calyx

Have a look at coconut, it has structure similar to persistent calyx

Why it is not called as persistant calyx?

let's see who will answer this

Correct answer will be marked
Brainliest

#Lycka03

Answer 1

The
Calyx can be classified on two basis, those are :





On the basis of size and shape :
i) Regular : The sepals of the calyx are of same size, e.g., chinarose.
ii) Irregular : The sepals are of different size, e.g.,

On the basis of fusion :
i) Polysepalous : The sepals are free from each other, e.g., mustard.
ii) Gamosepalous : The sepals are united, they may be fully united to form a calyx tube as in Datura, or they may be partially united, with the upper part of the calyx lobe free, forming teeth-like structures, e.g..

Structural forms of calyx
The structural forms of calyx are studied under the two major types, viz. : regular gamosepalous and irregular

Regular gamosepalous calyx :
The different forms of calyx under them are as follows :
i) Tubular: The calyx are united to form a tube-like-structure. e.g., Datura.
ii) Campanulate : The calyx lobes are united to form a bell-shaped structure, e.g., chinarose.

Irregula calyx :
In such case the calyx united, but the lobes are irregular.


Calyx of flower

i) Bilabiate : The calyx lobes form two distinct lip-like structures. The upp consists of three sepals and the an lower lip consists of two sepals, e.g., Leonurus.

Modification of calyx
The sepals are modified to form various structures for serving various functions and they are as follows :
ii) Spinous : The sepals are modified to form pointed, spine-like stuructures. e.g (B. Paniphal).

Answer 2

Coconut is a monocot and it has tepals or perianth.It doesn't have calyx and corolla thats why it has persistent tepals instead of persistant calyx.
But tomatoes, brinjal are dicots so they have persistant calyx.
I hope it will help u...