Question
Biology Question on morphology of flowering plants
Keel is the characteristic feature of flower of
A
Aloe
B
Tomato
C
Tulip
D
Indigofera
Answer
Indigofera
Explanation
Solution
Keel is the characteristic feature of flowers belonging to the family Papilionaceae. Indigofera belongs to this family, hence keel is seen in Indigofera.
The flowers of family Papilionaceae have butterfly-shaped corolla (papilionaceous corolla). Their posterior or outermost petal is the largest and is called standard or vexillum. The two lateral petals are similar and generally clawed, they are called wings or alae and the two anterior petals known as keel are united to enclose stamens and carpels. This type of petal arrangement is seen in bean, gram, pea, indigofera etc.