Ulmus serotina Sarg. Ulmus thomasii Sarg. Parietaria pensylvanica Muhl. Verbena brasiliensis Vell. Britton Verbena hastata L. Verbena officinalis L. Verbena rigida Spreng.
Verbena stricta Vent.
Verbena tenuisecta Briq. Viola arvensis Murray Viola blanda Willd. Viola canadensis L. Viola conspersa Rchb. Viola hirsutula Brainerd Viola lanceolata L. Viola macloskeyi Lloyd ssp. Viola sagittata Aiton var.