Page 42 - Pharmacognosy-I (02-06-06-102)

Kind of Flowers:
The flowers are described according to presence or absence

of both calyx and corolla as:
1- Complete: when the flower has both calyx and corolla.
2- Incomplete: when lacking some of the regular parts such the

absence of petals or sepals.

According to the symmetry of all floral leaves, the flowers
are described as follows:
1- Actinomorphic or regular: when the segments of each whorl
are

alike and regularly arranged i.e. the flower can divided by
number of radial

longitudinal cuts into equal halves e.g. cloves.
2- Irregular: when the members of one or more whorls are not all
alike,

irregular flowers may be:
a- Asymmetric: when all segments are irregularly arranged
and not alike. Thus the flower cannot be divided into equal
halves.
b- Zygomorphic: when the flower can be divided only in one
plane into equal halves as in Papilionoideae.

According to the presence or absence of both androecium
and gynaecium or of any of them, the flower is described as:

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