Roalson et al. (2015; https://www.researchgate.net/publication/279852219_A_revision_of_generic_boundaries_and_nomenclature_in_the_North_American_cleomoid_clade_Cleomaceae) raise Wislizenia refracta subsp. californica and Wislizenia refracta subsp. palmeri to species status (as Cleomella californica and Cleomella palmeri) in addition to moving Wislizenia refracta to Cleomella refracta. The treatment of Roalson et al. (2015) recognizes the same taxa as the current Jepson eFlora treatment (https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=48570), although under different names & ranks.

For a while, POWO had Wislizenia refracta moved to Cleome refracta, apparently an error. I sent an email, and the error's been corrected.