Stems

 

Origin

Embryo -

Shoot apical meristem and its derivatives

 

Mature primary growth tissues

 

Other steles

 

Secondary Growth

Annual rings

Spring wood

Summer wood

Rays

Vascular cambium

Cork cambium

Bark

Sapwood

Heartwood

Hardwood

Softwood

Dendrochronology

Twigs --external features.

 

Specialized stems

Rhizome

Stolon (runner)

Bulb

Corm

Tuber

Head

Cladophyll

Succulence

Tendril

Thorns

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