Question

Epipetalous stamens are seen in-
A) Thespesia
B) Datura
C) Male flower of Ricinus
D) Ravenala

Answer 1

Hint: The attachment of androecium with petals in several flowers is called epipetalous arrangement. It is a morphological character.

Complete answer:
The stamens are the male reproductive organ of a flower, they produce pollen grains. Stamens collectively form the androecium. The stamens can be present in a dainty manner along with different whorls of the flower.

On the basis of whorl they are attached with, they are of two types-
i) Epipetalous- when the stamens are attached to the petals. Example- brinjal.
ii) Epiphyllous- when the stamen is attached to the perianth. Example- lily.
In Datura, the stamens are attached to the petals. Therefore the attachment is called epipetalous.

Additional information :Terms related to placement of androecium-
i) Monadelphous: present in one bunch.
ii) Diadelphous: present in two bundles.
iii) Polyadelphous: present in more than two bundles.
iii) Didymous: two equal pairs of stamens.
iv) Didynamous: a long pair and a shorter pair of stamens.
v) Tetradynamous: present as a set of six stamens with four long and two shorter ones.
vi) Exserted: stamens extend beyond the corolla.
vii) Included: stamens does not extend beyond the corolla.
viii) Spiral: present in a spiral manner.
ix) Whorled: series of one or more discrete whorls.

Thus, the correct answer is option ‘B’ i.e, Datura

Note:
i) Diplostemonous: In two whorls, the outer ones present alternatively with the petals, while the inner one in the opposite direction.
ii) Haplostemenous: Having a single series of stamens, alternative to the petals and equal to the number of petals.
iii) Obdiplostemonous: In two whorls, having twice the number of stamens to that of petals.