- (botany) Any plant of Hydrophyllaceae, the waterleaf family.
- (paper technology) An absorbent unsized paper like blotters as opposed to slake-sized or hard sized papers.
- (botany) Any plant of the genus Hydrophyllum.
- (architecture) A leaf-shaped decoration used on the capitals of columns in late 12th-century Romanesque architecture
- A tropical plant (Talinum fruticosum), the leaves of which are eaten as a vegetable.