The genus name honors the English botanist William Vernon, who did fieldwork in North America. Back of a moist wildflower garden. Can also use on the , Tolerance, Not salt tolerant of inundation by salty or brackish water. Some tolerance to salty wind but not direct salt spray. , Habitat, Exposed sand and gravel bars of streams during low water, stream banks, hydric to wet mesic pine flatwoods. Rich soils. Ruderal. , Did You Know?, Showy flowers Nectar attracts butterflies and native beens.  Larval host for spring azure butterfly.

This species is listed as invasive in parts of the world where it is not native. Water garden, planting of surface water management pond. Often used , Tolerance, Not salt tolerant of inundation by salty or brackish water. Low/no tolerance of salty wind or direct salt spray , Habitat, Water. Ponds, lakes, quiet streams, swampa, ditches, canals. This species can be seen in the Lower Hillsborough Flood Detention Area in Hillsborough , Did You Know?, Showy flowers Pollinated by bees and flies.