Simple:
Naturally evolved roses usually have five petals.
Domestic roses have additional petals that were bred from the stamens.
Better:
There are a over a hundred species of roses in the genus Rosa.
You can find exceptions to many of the general characteristics described.
Exact numbers of petals, stamen and pistils, depends on the specie.
(There are, in addition, an unknown number of cultivars.)
Naturally evolved roses generally have five sepals, five petals and many spirally arranged stamens. The bases of the sepals, petals, and stamens are fused together to form a cup-like structure.
Domestic roses have additional petals that were bred from the stamens.
Roses have several to many pistils.
It depends on the tye and variety.
There are indefinite number of petals in rose flower due to conversion of stamens in to petals
5
The wild rose have 5 petals and indefinite number of stamens but in cultivated roses there are indefinite number of petals and stamens due to modification of some stamens in to petals. The carpel is pear shaped.
The Cherokee Rose is a single flower that lays flat as it absorbs the sun's rays. The 5 petals are white in color. There are 5 sepals beneath the petals. The center of the flower is bright gold.
Rose stalk may budded with the buds from rose plants having large count of petals in each flower.
If you can find someone to give them to you then they are free. But if you want them from an actual store you have to pay for them. They sell real rose petals as well as fake rose petals.
Euphorbia flower does not have petals.
A lavender rose does not a have a certain number of petals. It depends on each flower how many it has.
A cabbage rose is a plant of a hybrid rose species with large numbers of petals, or the fragrant flower of such a plant.
A rose is a flower, not a fuit.
Lotus flowers have all the flower parts so they are a complete flower.
The four major parts of a gumamela flower are the petals, sepals, stamen, and pistil. For a rose, the four major parts are the petals, sepals, stamen, and pistil as well.