Do roses have petals

No. There are petalless flowers. They reproduce by having the wind release their pollen.different classifications of flowers according to the presence or absence of their parts:

• Complete flowers are made up of calyx, corolla, stamens, and a pistil or pistils (the four "regular parts").
• Incomplete flowers lack one or more of the four regular parts of a complete flower as in all of the Fagaceae (oak family), Betulaceae (birch family) and Juglandaceae (walnut family).
• Perfect flowers have both stamens and pistils, but not necessarily sepals or petals.
• Imperfect flowers lack either stamens or pistils, and may or may not have sepals or petals.
• Naked flowers are without petals (apetalous) or sepals (asepalous) as in Zantedeschia spp. (calla lily).
• Apetalous flowers lack petals as in Elaeagnus pungens (silverthorn), Hydrangea spp. and Cornus florida (flowering dogwood).
• Staminate (male) flowers have a stamen or stamens, but no functional pistils.
• Pistillate (female) flowers have a pistil or pistils, but no functional stamens.