Flowers: Cactus Flowers medium-sized to large (often showy); flower tube 0.2-15[-30] cm; 1(-several) per areole; arising from axil of tubercle in the youngest areoles at the apex of the plant, or in the older areoles away from the apex, then often forming a ring around the apex; sessile (Pedicellate in Pereskia); fragrant, or odourless; nocturnal or diurnal; bisexual perfect (rarely unisexual); Actinomorfic (usually) to somewhat zygomorphic; partially acyclic. In cactus the flowers and the true ovary is hidden in the tips of specialized long shoots which strongly resemble inferior ovaries but often with areoles, scales, bracts and spines (or glochids in Opuntia) persistent or deciduous The fused stem ripens with the true ovary to become fruit wall.