I think it is so interesting that many of the first spring flowers are pink or yellow. I have daffodils planted near forsythia in the yard. It was not done intentionally, but I love that they both bloom roughly the same time. The big burst of yellow shouts out Spring! like nothing else. Here's burst of yellow from the Forsythia:
You can see each flower is held onto the branch by a little bit of green stem and four petals.
Inside each flower, there is also a touch of green near the upper base of the stamen. Each flower has 4 petals with a faint raised line down the center of the petal.
I like painting then with any shade of blue background – my preference is a grey-blue or a cerulean blue, depending on what mood Iam aiming for. A painting with single branch loaded with flowers makes a statement. But I also like painting them as a peek into the entire bush ,like the left side of photo above, where the flowers seem to go on and on. No matter what the composition, they are just fun to paint for the sheer joy of burst of yellow color and the sign that spring is on it's way.