Vascular bundles are arranged in a ring in the member of family ___________.
The study of the vascular bundles in some species of Euphorbiaceae presents the existence of bi-collateral bundles placed in the form of a ring. In Euphorbiaceae, the primary vascular tissue contains vascular bundles, commonly in one or two rings around the pith. Vascular bundles are even in size. Every vascular bundle is conjoint, collateral or bi-collateral and it is open. Phloem parenchyma is present. Bundle sheath is absent. No water-holding cavity is present.
Thus, the correct option is C.