Monticola is a synonym of campestris var. spicata, see the recently published Vol. 11 Fabaceae of Flora of North America (http://floranorthamerica.org/FNA_Vols_Published_2023_August - currently only available in print form) and VASCAN (https://data.canadensys.net/vascan/taxon/16376). POWO (https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:511704-1) and some other sources have not updated their nomenclature yet but POWO has been contacted about it.