People are more often picking the taller and possibly more potent Tibetan Snow Lotus plant. “The result? Researchers have reported that the height of the snow lotus has nearly halved over the past century.2,3”
“…But the Tibetan Snow Lotus6 is most certainly not an example of ‘evolution in action’…That’s because here, as always, natural selection7 can only remove existing genes; it cannot create new ones. And now that the Tibetan Snow Lotus population is losing the genes for taller plants (which likely set more seed than dwarf plants), its very existence is said to be under threat.8 All of this is very bad news for those who claim to see ‘evolution in action’, as the removal of genes by natural selection and extinction in no way explains how those genes arose in the first place.”
Excerpts from: https://creation.com/tibetan-snow-lotus
