In botany, blossom is a term given to the flowers of stone fruittrees (genus Prunus) and of some other plants with a similar appearance that flower profusely for a period of time in spring. Colloquially flowers of orange are referred to as such as well.
Blossoms are either pink or white depending on the species or variety. Peach (including nectarine) blossoms, most cherry blossoms, and some almond blossoms are usually pink. Plum blossoms, apple blossoms, orange blossoms, some cherry blossoms, and most almond blossoms are white.
Blossoms provide pollen to pollinators such as bees, and initiate cross-pollination necessary for the trees to reproduce by producing fruit.
Blossom trees have a tendency to lose their flower petals in wind-blown cascades, often covering the surrounding ground in petals. This attribute tends to distinguish blossom trees from other flowering trees.
Rosaceae (the rose family) are a medium-sized family of flowering plants, including about 2830 species in 95 genera. The name is derived from the type genus Rosa. Among the largest genera are Alchemilla (270), Sorbus (260), Crataegus (260), Cotoneaster (260), and Rubus (250). The largest genus by far is Prunus (plums, cherries, peaches, apricots and almonds) with about 430 species. However, all of these numbers should be seen as underestimates - much taxonomic work is left to be done here.
Roses can be herbs, shrubs or trees. Most species are deciduous, but some are evergreen. They have a worldwide range, but are most diverse in the northern hemisphere.