The skeleton of branched stems which gives a bunch or cluster its shape The rachis isn't obvious when covered with grapes, but very obvious after the grapes have been removed
the portion of the petiole or stem to which the green leafy part of the plant (fern) is attached
n , the central prolongation of the stalk (peduncle), the axis through an inflorescence, or of a leaf stalk (petiole), the axis through a compound leaf
In a pinnately compound leaf, the elongated structure that attaches to both the leaflets and the petiole, which then attaches to the stem A rachis is sometimes referred to as the axis of the pinnately compound leaf