Perigynous type of ovary is found in

The leafless stem of an onion which produces a cluster of terminal flowers is called:

Which of the following is incorrect for the calyx?

In $Hibiscus$ $rosa-sinensis$,there is an additional floral whorl known as:

$I.$ Standard petals
$II.$ Wing petals
$III.$ Keel petals
The above petals are found in:

Among bitter gourd,mustard,brinjal,pumpkin,China rose,lupin,cucumber,sunn hemp,gram,guava,bean,chilli,plum,Petunia,tomato,rose,Withania,potato,onion,Aloe,and tulip,how many plants have hypogynous flowers?