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Types of phyllotaxy

1. alternate phyllotaxy

If single leaf arises on a node and leaves of alternate node lies alternate to each other. eg.Hibiscus

2. opposite phyllotaxy

If pair of leaves arises on a node and lies opposite to each other. eg. Ocimum

• If opposite leaves on adjacent nodes lies on same plane known as superposed opposite phyllotaxy

•If opposite leaves on adjacent nodes lies perpendicular known as Decussute opposite phyllotaxy

3.Whorled phyllotaxy

If cluster or more than two leaves arises on a node. eg. Hydrilla

Phyllotaxy

Arrangement of leaves on the nodes of main stem or branches.

Tap Root

1. If primary roots are persist throughout the life of plant and continue to grow shorter or longer inside the soilwith successive development of root hair,root cap etc

2. It is dicot plant.

3. It develops from seed.

4. Roots are usually underground.

5. Primary growth is present

Adventitious Root

1. If primary roots stops to grow after sometime and cluster of thin thread like roots develops from the other part than radicle of embryo when the seed are developed from other underground or aerial branches,leaves,floweretc

2. It can dicot or monocot plants.

3. It develops from any part.

4. Roots are aerial and underground.

5. Primary growth is absent.

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