What does the term 'Polypetalous' mean?

Among bitter gourd,mustard,brinjal,pumpkin,china rose,lupin,cucumber,sunhemp,gram,guava,bean,chilli,plum,petunia,tomato,rose,Withania,potato,onion,aloe and tulip,how many plants have hypogynous flowers?

Papilionaceous flower with large vexillum covering two wings and the wings covering the keel has corolla aestivation of

$A$ flower is zygomorphic when:

Glumes are modified

When a flower is hypogynous,the position of the ovary is...