Here is a beautiful vintage illustration of a Rest Harrow with pretty pink flowers. The scientific name for this lovely plant is Ononis spinosa. The illustration is from a recent addition to my collection, a book titled Wayside and Woodland Blossoms by Edward Step, F.L.S., 1909. 
Click on image to enlarge.
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Julie is a vintage enthusiast and a Photoshop addict who collects old books and new recipes.
Contact her at: theolddesignshop(at) gmail(dot)com
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