The Water Poppy (Hydrocleys nymphoides) is an aquatic perennial plant that originates from Central and South America. It is highly valued in water gardening for its attractive and delicate appearance, will die back to the root in winter but regrow in spring.
Appearance: The Water Poppy produces round to oval, bright green leaves that float on the water's surface. The most striking feature is its flowers—pale yellow with a distinctive dark brown or purple center—resembling a poppy, which is how it got its name.
Size: 
The plant typically grows to about 4-6 inches above the water surface, with leaves that can spread up to 12 inches across.Flowers: Blooms typically occur during the warmer months, from late spring to early fall. Each flower lasts only a day but is quickly replaced by new blooms.Growth and 
Requires similar planting to water Lilly's, water poppy should be planted at a depth of 4 to 12 inches (10 to 30 cm) of water above the crown of the plant. This depth allows the plant to establish its roots while keeping its leaves and flowers floating on the surface. It thrives best in shallow areas of ponds or water gardens, where it can receive plenty of sunlight. For container water gardens, ensure the pot is submerged to this depth for optimal growth.