Pinnate Venation is vein arrangement in a leaf with one main vein extending from the base to the tip of the leaf and smaller veins branching off the main vein. This is the most common arrangement in Primula.
|Pinnate venation in P. blattariformis|
Palmate venation is vein arrangement in a leaf with the principal veins radiate out from a single point, most commonly where the leafstalk/petiole ends, and diverges out toward the edge of the leaf. Only a few Primula species have this arrangement such as: P. latisecta, P. palmata, P. vaginata, P. septemloba, P. alsophila, and P. geraniifolia.
|Palmate venation in P. palmata|