BOTANY Higher Secondary Second Year - Textbooks Online

Flower
Bracteate, bracteolate, pedicellate, dichlamydeous, complete, tetra or
pentamerous, actinomorphic and epigynous.
Calyx
Sepals 4 or 5, gamosepalous rarely polysepalous, showing valvate
aestivation. In Mussaenda, one of the sepals is brightly coloured. It is
called petaloid sepal.
Corolla
Petals 4 or 5, gamopetalous, hypocrateriform or salver shaped i.e. a
long narrow tube consisting of limbs – placed at right angles to the tube
(eg. Ixora coccinea), showing valvate or twisted or imbricate aestivation.
Androecium
Stamens 4 or 5, alternate with petals, epipetalous and inserted at the
mouth of corolla tube. Anthers are dithecous, basifixed, introrse and
dehiscing longitudinally.
Gynoecium
Ovary inferior, bicarpellary and syncarpous. Ovary bilocular with
one or numerous ovules in each locule showing axile placentation. Style
simple, stigma bilobed or capitate. There are five carpels in Gardenia.
Fruit
A berry (Ixora coccinea) or a capsule (Cinchona officinalis) or a
multiple fruit (Morinda tinctoria).
Seed
Endospermous.
Habit
Root
An evergreen shrub.
Botanical description of Ixora coccinea
Branched tap root system
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