Nupps aren't the only thing that makes this pattern textured, all of the small leaves, and some of the large leaves are composed of right-twisted stitches! This being extra work, I tend to prefer Barbara Walker's method of "Knit 2 together, knit the 1st stitch again, drop both from left needle", as opposed to the Niebling usual "Knit 2nd stitch, knit 1st stitch, drop both from left needle". Walker invented the method because the twisted stitch stand out more, and I like it because it is easier to knit.
As for the nupps, after translating the original instructions, which read:
Noppe = Man zieht den Faden 3 Mal liefer hindurch, legt die Schlinge auf die linke Nadel und strickt diese rechts ab. In gleicher Weise wiederholt man nach 4 mal. Dann strickt diese 5 Masche mit der N bezeichneten Masche rechts zusammen.
I did a test swatch and discovered that since the thread is drawn multiple times through the same stitches, it is easier to draw the thread under the strand between the stitches rather than through the center of the stitch((es) in the round(s) below.
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