Check out this article on Joan Beiriger's Art Licensing Blog. This is only an excerpt...to read entire article go to her blog post.
Step 1: On a new layer create an oval by using the elliptical marquee too to start creating a flower.
Step 2. Select a color in the foreground color swatch (at bottom of tool bar) and fill it by using the bucket tool. This example uses the color black.
Step 3. Select the Free Transform command by pressing the Command key plus the T key on the keyboard. A bounding box appears that surrounds the oval (not shown in example). A center marker (circle with a dot in the center surrounded by four tick marks) is in the center of the oval. Note: The red dot on the oval in the example represents the center marker. The oval will be duplicated and rotated around the center marker.
article continued...to read entire article go to her blog post.