Not a list of plants we think people might mix up. A list of plants our own identification model actually mistook for one another, on 38,299 openly licensed photographs, ranked by how often it happened. The method is published, and so is the error rate.
The model produced 1,741 distinct confusions in total. Most of them happened once, and a pair confused once is a bad photograph, not a botanical fact. A pair earns a page here only when the model mistook it at least 3 times and both species have enough photographs to show you the difference.