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प्रश्न
The mode of arrangements of sepals or petals in a floral bud is known as aestivation. Draw the various types of aestivation possible for a typical pentamerous flower.
उत्तर
The mode of arrangement of sepals or petals in the floral buds with respect to the other members of the same whorl is known as aestivation. The main types of aestivation are valvate, twisted, imbricate and vexillary. When sepals or petals in a whorl just touch one another at the margin, without overlapping, as in Calotropis, it is said to be valvate. If one margin of the appendage overlaps that of the next one and so on as in china rose, lady’s finger and cotton, it is called twisted. If the margins of sepals or petals overlap one another but not in any particular direction as in Cassia and Gulmohar, the aestivation is called imbricate. – In pea, bean and Crotolaria flowers, there are five petals, the largest (standard) overlaps the two lateral petals (wings) which in turn overlap the two smallest anterior petals (keel); this type of aestivation is known as vexillary or papilionaceous (or descending imbricate).
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संबंधित प्रश्न
Define the following term:
Aestivation
Define the following term:
Placentation
Define the following term:
Epipetalous Stamen
Define the following term:
Perigynous flower
Describe the various types of placentations found in flowering plants.
A typical flower has 4 different kinds of whorls arranged successively on the swollen end of the stalk/pedicel is called
In a flower, withing a whorl, sepals or petals touch each other at margins without overlapping such flower is of :
Fertile part of stamen is ______
Diadelphous stamens are found in ______.
The arrangements of ovules within the ovary is known as placentation. What does the term placenta refer to? Name and draw various types of placentations in the flower as seen in T.S. or V.S.
