This is beautiful embroidered ribbon trim!  It features two different floral motifs that repeat down its length.  I’m not sure of its composition, but I did a burn test, and it appears to be cotton embroidery, albeit with a sheen, on maybe a silk base.  Colours are green and brown on a light yellow base.  It definitely is older, probably at least 1930s or earlier.  It is 2 1/2” in width and I have about 11 yards available - price is per yard.