The genus name honors the English botanist William Vernon, who did fieldwork in North America. Moist wildflower garden. Also useful to naturalize alo , Tolerance, Not salt tolerant of inundation by salty or brackish water. Some tolerance to salty wind but not direct salt spray. , Habitat, Hydric to moist savannas, openings along streams, wet pastures, floodplains, bluffs, bay swamps. , Did You Know?, Showy flowers Nectar attracts native bees and butterflies.  Larval host for Spring azure.

Predominantly a Florida plant, but it has also been recorded in Georgia, South Carolina, North Carolina, and Texas. The species name "tomentosa" refer , Tolerance, Unknown Unknown , Habitat, Scrub, sandhill, edges of xeric hammocks, scrubby flatwoods , Did You Know?, Showy flowers Larval host for monach (Danaus plexippus) , queen (Danaus gilippus) and soldier (Danaus eresimus) butterflies.  Nectar plant for many b