Grows well well north of its native range.  Documented in very southern counties with an outlier in Martin County -- that outlier is also unique in that it was collected near a cypress dome. Closely related to corn, this species has been crossed with maize to produce a corn that is resistant to Helminthosporium turcicum, the fungus that causes northern leaf blight  (Wikipedia). Listed as Threatened in Florida. Informal borders.

This plant is believed to be extirpated in the wild in Florida.  According to most sources, it was known from a single area south of Miami near Biscayne Bay.  Old specimens at the University of Florida Herbarium for Escambia and Okaloosa counties were re-examined in 2006 and re-identified as Baccacharis dioica.  It has also been reported to have been found on a dune near Mobile, AL (Woodlanders, Inc.) and introduced into the nursery trade from there.  The map of herbarium speciment locations on the Florida Plant Atlas have not been updated.  Plants commercially available in FL apparently come from imports from the Bahamas. Where a moderate-sized shrub is wanted.

Shade tree.

Foliage is fine-textured. Fast growing. Subject to root problems in poorly drained areas. Highly flammible and old trees are weak.  Think twice about placing a building in a sand pine forest. Forest plantings for dry sites, specimen tree. Best not planted adjacent to buildings.

This is one of Florida's most showy and most under-appreciated wildflowers. Look for it along disturbed roadsides in mid-late winter and early spring. This is a personal favorite of one of the authors -- it grows and bloom early and attracts lots of insects.  The only issue is the prickles, so I wear gloves when weeding around it.  It reseeds readily so long as there is good sun and  bare ground where the seeds land. Don't let the name fool you, this is a Florida native. Wildflower garden. Roadside wildflower areas. This plant blooms from late winter into spring displaying its large flowers when little else is blooming in the garden.

Understory tree, use as a background plant or screen.

Used for wetland restoration. Attractive for planting in surface water management ponds.

Trellis or fence

In a managed garden, gamagrass can be trimmed back at the end of winter. Hedge, foundation planting, individual large grass clump, background screen for a flower garden. Rain garden or bioswale.