The cells of sclerenchyma vary in size and shape. They are placed in two groups: the fibres and sclereids. The cells of the fibres are elongate whereas the cells of sclereids are short isodiametric or irregular in shape.
Fibres vs Sclereids
- Fibres are elongated
- Have tapering end walls
- Generally unbranched.
- Originate from meristematic cells.
Sclereids (Sclerotic cells)
- Sclerids are broad.
- End walls are blunt
- May be branched or unbranched.
- They are formed secondarily by the thickening of parenchyma cells