Juvenile foliage - Young leaves of tree that that produces one type of foliage in new or young growth and mature leaves of a distinctly different shape.
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43. Juvenile foliage - the young leaves of a tree that produces two distinct shapes of leaves; the second type being mature foliage.
The foliage can have a mixture of adult and juvenile foliage and as this combination can disrupt the design of a bonsai so varieties of J.media that display only one form of foliage tend to be used.
Mature trees usually continue to bear some juvenile foliage as well as adult, particularly on shaded shoots low in the crown. It is largely dioecious with separate male and female plants, but some individual plants produce both sexes.
But then the inevitable happened, the tree started to revert back to juvenile foliage, and there went my design and future plans. As you can see from the picture below, the tree is losing not only its shape, but its attractiveness also.
A branch, which has been stripped of its bark and cambium to represent a
dead branch; illustrating great age or harsh conditions.
Juvenile foliage
The young leaves of a tree that produces two distinct shapes of leaves; the ...
Many Junipers produce two types of foliage, the normal adult foliage, which is close and compact and the juvenile or 'oxycedrus' growth. Both types can occur on the same tree, indeed on the same branch. Juvenile foliage is often seen as a result of ...
Over-watering, like other stressful conditions (cutting back hard or repotting), often results in the growth of juvenile foliage (a coarse, spiky needle). This foliar form represents the juniper's defense against unsuitable and damaging conditions.
Species that display predominantly one or the other are typically used for Bonsai gardening. Some scale like species will revert temporarily to the needle-like juvenile foliage if heavily branch pruned or trunk pruned, ...
 See also: Tree, Species, Needle, Conifer, Plant
  
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