Carpels are fused in the flowers of

Rafflesia arnoldii is a/an .......

The standard petal of a papilionaceous corolla is also called

The angiosperm to which the largest flower belongs is a:

Vexillum,alae,and keel are parts of which floral whorl?

Identify the type of aestivation shown in the given figures $P, Q, R,$ and $S$ and select the correct sequence of plants in which they are found.