When Louis Vuitton, Rochas, and Valentino are showing bloom-adorned frocks, this pattern is anything but old-fashioned. Little Cat Design Co.’s “Mod Flower” suite consists of a botanical-enlivened invite, R.S.V.P. postcard, and wallet reminder. Vellum wrapping, fastened with a self-adhesive wax seal, holds the elements together. Have Little Cat print it (price upon request), or opt for a digital file and do it yourself to save some ducats.