Question

How many plants among Indigofera, Sesbania, Salvia, Allium, Aloe, Mustard, Groundnut, Radish, Gram, turnip have stamens with different length in their flower?
A. Three
B. Five
C. Four
D. Six

Answer 1

Flowers are classified on the basis of length of the filament and number of Stamens present. It can be didynamous and tetradynamous.

Complete answer:
Stamen is the male part of the flowering plant with the male gametes present. It is composed of anther and filaments. Filament holds the anther and anther construct the pollen grains for pollination. When the stamens are present six in number (four long and 2 Short) it is called tetradynamous in which two of them are shorter than other whereas when the stamens are four in number (two long and two short) it is called didynamous with pairs of unequal length.
Indigofera is a leguminous plant which is mainly seen in tropical and subtropical environments. These are tiny trees with pinnate leaves. It is a long lasting crop with the open carpels and thick pericarp present. Mainly used in the production of indigo dye.
Family of this plant: Fabaceae.
Sesbania is a fast growing plant. Those leaves are regular whereas flowers are round. Mainly used for nitrogen fixation and in agroforestry.
Family of this plant: Fabaceae.
Salvia is an annual, perennial herb with woody shrubs. It has appendages on the leaves, stems and it performs an abnormal pollination process.
Family of this plant: Lamiaceae.
Allium and Aloe belong to the family Liliacea. Alium are the bulbs which have the same flavour and smell as onion and garlic. Aloe are ornamental plants for both garden and pots. Mustard, Radish, Turnip belong to a family of Brassicaceae having perennial herbaceous plants. It is found that Salvia, Turnip are didynamous in nature whereas Mustard and radish are Tetradynamous in nature. Hence there is variation in their length of stamen.

Therefore the correct answer is C.

Note: It is found that the family Brassicaceae and Lamiaceae have distinct stamen length so out of ten plants four plants have unequal length of stamen.