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Collenchyma cells bear a strong resemblance to Parenchyma. However, they have some distinguishing traits. They occur in groups just beneath the Epidermis. They have a primary cell wall which contains lots of pectins. Thus, they stain pink with Toluidine Blue. The cell wall is unevenly thickened, however. | |
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The thickenings can occur at the corners of adjacent cells. This is called Angular Collenchyma. This is illustrated in this embossed image. | |
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Longitudinal Section of Collenchyma which shows the Long Tapered shape of Collenchyma Cells. | |
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