It's a cultivar, meaning a specific variety of the European pear species, Pyrus communis. The 'Bosc' designation refers to the particular pear variety named after the French horticulturist Louis Bosc.
Produces soft and sweet yellow pears with russet-brown skins in fall; showy white flowers in spring and an upright oval habit, very ornamental; needs a pollinator, fallen fruit can be messy, can be susceptible to fireblight.
This variety requires a different selection of the same species growing nearby in order to set fruit.
