I love vintage botanical prints like the samples below. I have several pieces of framed artwork similar to these and they are some of my very favorites. I'll have to take a photo sometime.
I was inspired to use JustRite's Breath of Spring stamp set, particularly the violets bouquet, to create some cards with this vintage, botanical feel. I stamped the floral image right onto some patterned paper. I love the subtle, polka dot background it instantly gives my images. Be sure to look for this type of paper when you're shopping, it's not just for backgrounds...stamp right on it and then color. These papers are from K and Company. Thank You sentiment is from Papertrey's Big and Bold Wishes stamp set.
I love the E31 Copic marker that I used for outlining the image. Instead of a blue color, this tan color really ties in that vintage feel. I just love how soft and pretty these cards turned out.
Tip: When coloring floral images, simply do an Internet search for the type of flower you're going to color. Then print it off to have a visual reference at your stamp area. It's a good thing.