What type of hydrophyte is Hydrilla?

The classification of Hydrilla as a root-submerged hydrophyte is accurate because this plant primarily grows submerged in water, anchoring itself to the bottom with its roots while its stems and leaves extend toward the surface. Root-submerged hydrophytes are adapted to live completely underwater, allowing them to thrive in various aquatic environments such as lakes, ponds, and slow-moving rivers. They play a significant role in aquatic ecosystems by providing habitat and food for numerous organisms.

In contrast, free-floating plants are not anchored to the substrate; they float on the water's surface and are reliant on water for buoyancy. Emergent plants, on the other hand, grow partially submerged, with their stems and foliage rising above the water, typically found along the edges of water bodies. Semi-aquatic plants inhabit areas that are alternately submerged and exposed and can thrive in both aquatic and terrestrial environments.

Thus, Hydrilla's growth form distinctly classifies it as a root-submerged hydrophyte, showcasing its unique adaptations to an aquatic lifestyle.