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Morphology Of Flowering Plants

Question
CBSEENBI11002080
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In China rose the flowers are

  • actinomorphic, hypogynous with twisted aestivation

  • actinomorphic, epigynous with valvate aestivation

  • zygomorphic, hypogynous with imbricate aestivation

  • zygomorphic, epigynous with twisted aestivation

Solution

A.

actinomorphic, hypogynous with twisted aestivation

Actinomorphic  (star-shaped) can be divided into 3 or more identical sectors, which are related to each other by rotation about the centre of the flower, e.g., china rose. Zygomorphic flowers can be divided by only a single plane into two mirror-image halves., e.g., orchids.
Valvate aestivation: The sepals or petals in whorl just touch one another at the margin, e.g., Calotropis.
Twisted aestivation: One margin of the appendage overlaps that of the next one, e.g., china rose. Imbricate aestivation the margins of sepals or petals overlap but not necessarily in a specific direction. e.g cassia.

Some More Questions From Morphology of Flowering Plants Chapter

What is meant by modification of root? What type of modification of root is found in the:
(a) Banyan tree
(b) Turnip
(c) Mangrove trees

Justify the following statements on the basis of external features:
(i) Underground parts of a plant are not always roots.
(ii) Flower is a modified shoot.

How is a pinnately compound leaf different from a palmately compound leaf?

Explain with suitable examples the different types of phyllotaxy.

Define the following terms:

(a) aestivation

Define the following terms:

(c) placentation

Define the following terms:

(c) actinomorphic

Define the following terms:

(d) zygomorphic

Define the following terms:
(e) superior ovary

Define the following terms:
perigynous flower

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