Here is a vintage botanical illustration of a plant with yellow flowers and green heart-shaped leaves. The name of the plant is Yellow Wood-Sorrel; the scientific name is Oxalis Stricta. The image is from Wild Flowers of America, published July 17, 1894. 
Click on image to enlarge.
Julie is a vintage enthusiast and a Photoshop addict who collects old books and new recipes.
Contact her at: theolddesignshop(at) gmail(dot)com
So pretty – thanks
You’re welcome Elaine. I’m glad you like it. 🙂
Thank you
You always have just what I’m looking for.
Thank you so much
You’re welcome Paulette. I’m happy to know you can find what you’re looking for here. 🙂