Royal School of Needlework - Jacobean Crewelwork is a traditional technique worked in crewel wool on heavy linen twill using surface embroidery stitches. The designes are based on the Tree of Life.
Jacobean Embroidery: Era & Style, not Technique – NeedlenThread.com
SS23ONL501 Jacobean Crewelwork: 'Curly Leaf & Berries' - Royal School of Needlework
Embroidery: Crewel Work | How to Embroider a Jacobean Flower - YouTube