Botany and Plant Science

Here the corolla is funnel shaped. The corolla tube slowly tapers down to a narrow base. E.g. Datura, Tobacco, etc.

Here the corolla is gamopetalous & all the petals combine to form a cylindrical tube. E.g. Disc florets of Sunflower, Ipomoea, etc.

This is defined as the condition when both the anther and the stigma of a bisexual flower mature at the same time, due to which self pollination is very easily achieved, e.g. Mirabilis jalapa.

Here the nuclear division is followed by wall formation. Consequently the embryosac has several chambers. Some of the chambers may have more than one nucleus.

It is seen in all the anemophilous trees that the flowers are produced after all the leaves are shed, so that the pollen are easily taken away by wind without any interference.

Pentacarpellary ovary has five carpels. The prominent examples are Hibiscus & Apple.

Here, the ovule takes a 90^o turn making the micropyle is at right angle to the funicle.

This inflorescence is defined as a modified type of spike with a pendulous peduncle having unisexual flowers. The prominent examples are Acalypha, Mulberry, etc.

Here the peduncle ends in a flower, consequently one branch of the peduncle develops at a lower level and ends in a flower. The prominent example is heliotropium.

Here the main axis is shortened and bears at its tip a whorl of bracts. From the axil of each bract a flower arises. All the flowers are located at the same level. The flowers show centripetal arrangement. The prominent example is Hydrocotyle.

Here the cells located differentiates into different types of tissues. This region produces root hairs. These root hairs take part in the absorption of water and mineral salts from the soil.

These roots posses a special tissue called the velamen. This tissue absorbs moisture from the air and makes it available to the plant. These roots do not penetrate the host tissue like parasitic roots. The prime examples includes Vanda.

This type of root is prominently seen in Ipomoea batotas (sweet potato) where the modified adventitious root is swollen without any definite shape. It is always produced singly and not in clusters.

This type of pollination is being done by snails.The prime examples are Arisaema & Arum bulbs.

These roots are prominently seen in momordica where the roots show bead-like swellings at regular & definite intervals.