Explanation

Palmate or multicostate venation is the type of venation where leaf lamina consists of a number of main veins (midribs) or costae arising from its base. It may be convergent (main veins running parallel converge or unite towards apex), e.g., bamboo and grasses or divergent (main veins diverge towards the margins of the lamina), e.g., fan palm. In banana and Canna pinnate or unicostate parallel venation is found.