TYPES OF RETICULATE VENATION

• UNICOSTATE or PINNATE
  The main fibrovascular supply traverses the length of the lamina from base to apex and forms the midrib or the prominent single costa. The midrib and the secondary branches resembles the general plan of a feather hence called pinnate.
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• MULTICOSTATE or PALMATE
  The main vascular supply after reaching the base of the lamina, breaks up into a number of equally strong veins or costas. Thus, there is no midrib and costas spread out as the fingers from the palm of the hand hence called palmate.
• Multicostate Reticulate Venation can be further divided as:
  i. Convergent – When the prominent veins (costas) after spreading out from the base again converge towards the tip of the lamina Eg. Zizyphus.
  ii. Divergent – When the prominent veins (costas) spread out farther and farther apart Eg. Cucurbits and China rose.

TYPES OF PARALLEL VENATION

• UNICOSTATE or PINNATE
  The midrib (single prominent costa) runs from base to apex of the lamina and gives rise to parallel veins which are joined by transverse veinlets which are again parallel to one another.
  Eg. Banana (Musa)
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• MULTICOSTATE or PALMATE
  The main vascular supply after reaching the base of the lamina, breaks up into a number of equally strong veins or costas which can be:
  i. Convergent – Eg. Bamboo
  ii. Divergent – Eg. Fan palm
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