The Clematis pattern appears in A Compendium of Knitted Stitch Patterns by Shelagh Hollingworth. It also appears in A Treasury of Knitting Patterns by Barbara Walker and in Lace & Eyelets by Erika Knight, under the name Hourglass Eyelet Pattern. It’s featured in the Corrine sock pattern.
Shown with a cast-on count of 12 stitches.