Question

Which plants show monadelphous condition belongs to Fabaceae?
A. Dolichos
B. Crotalaria
C. Tridax
D. Both A and B

Answer 1

Hint: The filament present in flowers are fused together or at least partly and are joined through tubes. The stamen present in flowers are arranged in filaments and nine different stamens are connected into one unit in the filament.

Complete answer: Stamens of flowers are united into one bundle in a monadelphous condition by their filaments and can be seen on Dolichos and Crotalaria that belong to the Fabaceae family. Both Crotalaria and Dolichos are genera of flowering plants. The androecium is monadelphous in both Dolichos and Crotalaria plants. Anthers are free in the united filaments bundle on two separate sides. Asteraceae is the family in which Tridax shows a polyadelphous condition, where stamens get united into three or more groups. Dolichos is included in the lablab bean under the legume family. Okra and china rose are some of the examples of monadelphous stamens. Dolichos are herbs as well as shrubs that grow upright and have woody rhizomes. On the other hand, Crotalaria includes both herbs as well as shrubs. It is used as a food by the larvae of some Lepidoptera species.
Therefore, the correct answer is option D.

Note: Cotton is an example of monadelphous in which a single bundle formed from the stamen and on the other hand, two bundles and anthers are free-formed from the filaments in the case of diadelphous.