Which of the following is known as $Congress\,grass$?

The floral diagram represents which one of the following families?

Replum is found in which family?

The placentation in Malvaceae is of ....... type.

In the $Fabaceae$ (Papilionoideae) family,the $5$ petals form a distinct arrangement involving $3$ different types of elements: the standard (vexillum),wings (alae),and keel (carina). What is the number of these elements respectively?

Datura belongs to which family?