Question

Which is not the characteristic feature of fabaceae?
A. Taproot system, compound leaves, raceme inflorescence
B. Flowers actinomorphic, aestivation twisted and gamopetalous
C. Stamens 10, introrse, basifixed, dithecous
D. Monocarpellary, ovary superior and bent stigma
E. Fruit is legume

Answer 1

Hint: Fabaceae family includes leguminous plants. They have many unique features such as root nodules, tap root system, racemose inflorescence, dithecous anther, superior ovary, legume fruit, etc. Shrubs, herbs, trees and majorly climbers are also found in this family.

Complete answer:
Fabaceae commonly called as legume, pea, or bean family. This is the large economically important family of the flowering plants. These have characteristic flowers and fruits. It is most commonly found in tropical rainforests and in dry forests in the Americas and Africa. Some important features of Fabaceae family are: they are dicotyledons, having taproot with root nodules. Stem is erect or climber. Leaves can be compound or simple. Racemose inflorescence is observed in these family plants. Flowers are bisexual and zygomorphic. Calyx is gamosepalous. Dithecous anther and superior ovary is present in legume plants. Legume fruit is formed. Seeds can be one or more and non-endospermic.
The flowers of this family are medianly zygomorphic (bilateral symmetry),bisexual. Ascending imbricate aestivation (posterior petal overlaps) is observed. Group of five petals are found that’s why they are also called as polypetalous (flowers having distinct or separate petals)
From the above information we have found that fabaceae do not have features such as flowers actinomorphic, aestivation twisted and gamopetalous.

Hence, the correct answer is option (B).

Note: Fabaceae is the third largest land plant family. It includes 751 genera and about 19,000 known species. Astragalus, Acacia, Mimosa and Crotalaria are some largest genera of this family. The plants belonging to this family have many economical importance due to their unique features. They have root nodules which help in nitrogen fixation. Pulses are the good source of protein.