Jekyll Cross Vine. Dr. Michael Dirr tells the story of him and his wife Bonnie bicycling on Jekyll Island, GA when he noticed this particular selection of cross vine with bright orange flowers growing in the wild. He took cuttings and now we have a new cultivar which he named of all things, 'Jekyll.' Even though found in the southern extremity of its range, it has proven to be one of the most cold-hardy selections. Since plants in this genus climb by means of tendrils with adhesive discs, it has the ability to climb almost any "textured" surface, such as brick, stone or wood.