Which floatingheart species is recognized for having rough (pebbly) leaves on the underside?

The big floatingheart is notable for its distinctive rough, pebbly texture on the underside of its leaves. This characteristic differentiates it from other species of floatingheart, which generally have smoother leaves. The leaf texture can serve functional purposes, such as aiding in buoyancy and water retention, which are vital for the plant's survival in aquatic environments. In contrast, the other floatingheart species mentioned do not share this specific leaf texture, making it an identifying feature when distinguishing between them. Understanding these traits is essential for effective identification and management of aquatic weeds in Florida, where these species may impact local ecosystems.