The rose is the classic flower of One Stroke painters. it is somewhat more difficult than the other flowers because it has so many components, but once mastered it is so beautiful and well worth all the practice.
First start by practicing the bud, when you have mastered the bud, the sea shell which is the petal shape that the whole rose is made of.
The comma stroke comes next, to make the small petals that go around the bud.
When practicing, remember to leave a hole in the centre of the first five petals, if you don't, your second row of petals will be as big or barely bigger than the first row and it won't look like much of a rose.
Have fun!