Stem

It Is The Main Axis Of The Plants In Which Leaves And Flowers Are Found.

  Habit Of Stem :

 Herbaceous -

 Any Non Woody Stem

e.g. - Ranunculus.

Woody - 

The Stem Of Large Trees And Shrubs.

Types Of Stem -

 Aerial - 

The Stem Which Are Found Above Ground.           

Erect -  Straight

Prostate - Weak Stem

Climber - Weakest Stem 

Special Stem :

 Phylloclade - 

It Is A Green, Flate Or Round Stem Having Many Internodes With Spiny Leaves.

e.g. Opuntia

Cladode -

It Is A Type Of Phylloclade With One Internode e.g. Asparagus Or Two Internode.

 e.g. Roscos

External Shape Of Stem :

 Cylindrical - 

The Stem Which Is Circular In A Transverse Section.

e.g. Lemon

Angular - 

The Stem Which Shows Many Lateral Angles In

 A T.S

e.g. Asparagus, Coriandrum

Branching In Stem : Branched/Unbranched

Interior Part Of Stem :

Solid - 

The Stem With Filled Interior

e.g. Lemon (Rutaceae)

Fistular - 

The Stem With Hollow Interior

e.g. Wheat, Bamboos etc

Surface Of Stem :

Hairy - 

Surface Covered With Hairs

e.g. Calotropis.

Glabrous - 

Stem Without Hairs (Smooth)

e.g. Lemon.

- Anand Kumar 

Humbles.in