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Pal Meir

Secondary Stem Growth

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Pal Meir

Diffuse secondary growth: »Known also as sustained primary growth, diffuse secondary growth occurs in some taxa and leads to an increase in stem diameter, largely as a result of an increase in fibrousness. The diameters of fibres may increase, as may the wall thickness of individual cells. Likewise, both the length of fibres and the number of fibres in bundle sheaths can become greater. There may also be some cell division in parenchyma cells. Large air spaces, lacunae, are formed in some stems.« (Genera Palmarum 2008: 7)

Lytocaryum insigne, first signs of trunking four years since germination:


… and secondary growth:



More segments made visible:



Now 7 segments without leaf sheaths visible:


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Way over my head but love the breakdown. Informative :shaka-2:


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