An embroidery technique in which patterns are made by sewing vertical stitches of different lengths in a row, according to an ascending or descending sequence. The most common stitch associated with the technique is the flame stitch, which is also known as the Bargello stitch, the Florentine stitch, the Hungarian stitch or the Irish stitch. Traditionally worked in wool or silk on canvas fabric, the row-based sequence of stitches creates a wave-like pattern, emphasised using different-coloured threads.