This pattern is from the book New England Knits which is available in print and eBook.

This pretty and flattering top-down cardigan has a nipped-in waist and leaf lace front panels. With button tab closures and buttons on both fronts, the sweater can be customized by adding as many or as few buttons as you like and placing them to suit your taste. It’s perfect for layering over a tank or T-shirt on a breezy day.