Roses feature multiple stamens, leaves that grow in alternate patterns on the stem, symmetric, unconnected petals that number four or five, prickles on the stems and bisexual reproductive parts. Roses come in numerous colors, including red, pink, blue, purple, white and black.
Roses produce nectar from the hypanthium, which provides the base for the petals, stamens and sepals. Most roses are pollinated by insects and produce fruit in a structure known as the "rose hip." The fruits resemble berries and can be red or black in color.
Physical characteristics vary among the more than 100 species of roses. Most grow on bushes, though some species form small trees.