A freshwater (i.e. aquatic) plant consisting of free-floating rosettes of leaves (up to 30 cm across) with feathery roots (up to 80 cm long). Plants develops runners (i.e. stolons) and often form dense mats of vegetation on the water surface.

Is Pistia an offset?

In Pistia, the process of vegetative propagation occurs in presence of offset when one intermode appears to run horizontally along the soil surface thereby ultimately giving rise to a new plant either from its axillary or terminal bud. Therefore, this is the correct option.

Is Pistia and water lettuce same?

Pistia is a genus of aquatic plant in the arum family, Araceae. ... The single species it comprises, Pistia stratiotes, is often called water cabbage, water lettuce, Nile cabbage, or shellflower.