Its acorn is large (about an inch long) and is nearly enclosed by its cup or receptacle--hence the name "overcup." Shade tree. , Tolerance, Not salt tolerant of inundation by salty or brackish water. Low/no tolerance of salty wind or direct salt spray , Considertions, Falling/fallen acorns can be an issue. , Wildlife, Acorns appreciated by squirrels, deer, turkey, and other wildlife Used by birds for resting and nesting Said (by the Lady Bird Johnson Wildlflower Cen , Habitat, Bottomland floodplains and inundated river levees, lake swamps, rarely on non-wetland portions of floodplains. , Did You Know?, Host plant for the White-M Hairstreak and Horace's Duskywing butterflies.

The range of this species is primarily the coastal plain from Texas to North Carolina. A second subspecies (subsp. greenmanii) occurs in the Florida P , Tolerance, Not salt tolerant of inundation by salty or brackish water. Unknown , Considertions, All parts of this plant are poisonous if ingested.  Bruised leaves may produce a rash on bare skin , Habitat, Marshes, wet flatwoods, wet prairies, seepage slopes, edges of cypress wetlands, ditches , Did You Know?, Showy flowers Host plant for black swallowtail. Attracts generalist pollinators.