Stem is herbaceous in family.

The species which yield commercial cotton belongs to the family:

To which family does gram $(Cicer \text{ } arietinum)$ belong?

Given below are a few floral formulae of some well-known plants. Identify the families and describe the floral diagrams for these formulae.
$(i)$ $\oplus \, K_{(5)} \, C_{(5)} \, A_{5} \, \underline{G}_{(2)}$
$(ii)$ $\% \, K_{(5)} \, C_{1+2+(2)} \, A_{(9)+1} \, \underline{G}_{1}$
$(iii)$ $\oplus \, K_{5} \, C_{5} \, A_{5+5} \, \underline{G}_{(5)}$

The floral formula given below is that of:

The main characteristic of the ovary of mustard ($Brassica$ $campestris$) is: