(a) Racemose and cymose inflorescence:
In racemose type of inflorescence the main axis continues to grow, the flowers are borne laterally in acropetal succession. Acropetal succession means that older flowers are at the base and younger flowers are near the apex. In cymose type of inflorescence the main axis terminates in a flower, hence is limited in growth. The flowers are borne in a basipetal order. In basipetal succession older flowers are at the apex and younger flowers are near the base.
(b) Fibrous root and adventitious root:
In monocotyledonous plants, the primary root is short lived and is replaced by a large number of roots. These roots originate from the base of the stem and constitute the fibrous root system, as seen in the wheat plant. In some plants, like grass, monstera and the banyan tree, roots arise from parts of the plant other than the radicle and are called adventitious roots.
(c) Apocarpous and syncarpous ovary:
When more than one carpel is present, they may be free as in lotus and rose and are called apocarpous. When carpels are fused as in mustard and tomato, they are termed syncarpous.
