The top comment when I clicked it does not agree with the narrative:

@rkozakand 10 months ago

The so called "southwestern motif" is found wherever people weave. Our native rugs in the mountains of Ukraine use the exact same motif, only in different colors. It is a natural outgrowth of weaving techniques, which encourage triangles. We also have ancient pottery from what is called the Trypillian culture, which includes spirals and what you call 'zen tangle' motifs, which we call 'bezkonechnyk'. This pottery looks very similar to Southwest American pottery, even being executed in the same colors. I therefore doubt that they are as tied to specific plants as you think, although patterns repeat in nature, and maybe we have similar plants.