Botany, also called plant science(s) or plant biology, is the science of plant life and a branch of biology. A botanist is a scientist who specializes in this field of study. The term "botany" comes from the Ancient Greek word âïôÜíç (botane) meaning "pasture", "grass", or "fodder"; âïôÜíç is in turn derived from âüóêåéí (boskein), "to feed" or "to graze". A person who studies plants may be called a botanist or a plant scientist. Traditionally, botany has included the study of fungi and algae, studied by mycologists, phycologists respectively, with the study of plants and these three groups of organisms remain within the sphere of interest of the International Botanical Congress. Nowadays, botanists study approximately 400,000 species of living organisms of which some 260,000 species are vascular plants and about 248,000 are flowering plants.