palmate
radiating fan-like from approximately one point
palmately lobed
lobes of the leaf are arranged in a manner similar to a hand
parallel venation
the main veins of a leaf running parallel or nearly so
petiole
the stalk of a leaf
pinnate
arranged featherwise on each side of a central stalk
pinnately lobed
lobes of the leaf are arranged in a line
rachis
the central stalk of a compond leaf