Which feature is indicative of spatterdock?

The feature indicative of spatterdock is the presence of large yellow flowers that emerge above the water surface. Spatterdock, also known as Nuphar lutea, is a type of aquatic plant that is characterized by its distinct flower structure. The flowers are not only large but also have a vivid yellow color, making them quite noticeable against the backdrop of the water. This feature is particularly critical for identification purposes, as the plant's reproductive structures play an important role in its life cycle and ecosystem function.

In contrast, while long, narrow leaves with pointed tips and dark green, leathery leaves with round shapes describe other plant species, they do not pertain to spatterdock. Spatterdock leaves are typically more rounded and have a distinctive shape associated with their floating nature. Likewise, floating leaves with notched margins are also typical of different plant species in aquatic environments and are not a defining feature of spatterdock. Therefore, recognizing the large yellow flowers as a key identifying characteristic helps in accurately identifying and distinguishing spatterdock from other aquatic plants.