Wilbur Howard Duncan

Quercus oglethorpensis (also called Oglethorpe oak) is a species of plant in the beech family. It is endemic to the United States. It is named for Oglethorpe County, Georgia, where it was first discovered. The county, in turn, is named for James Oglethorpe, the founder of Georgia Colony in the 18th century.

Trillium persistens, the persistent trillium, is a North American species of flowering plants in the genus Trillium of family Melanthiaceae (formerly Trilliaceae). The plant is also called the persistent wakerobin. Persistent trillium is an endangered herbaceous perennial plant that grows to a height of 20–30 cm, with three leaves in a whorl near the top of the stem just below the flower; each leaf is broad lanceolate, 3–9 cm long and 1.5–3.5 cm broad. The white flower has three petals, each petal 2–3.5 cm long and 0.5–1 cm broad. This plant has a limited range in parts of the United States

Baptisia arachnifera, commonly known as hairy rattleweed, cobwebby wild indigo, hairy wild indigo, and hairy false indigo, is an endangered species of flowering plant in the legume family. Its native habitat is limited to sandy soils in pinewoods along the coastal plain of the U.S. state of Georgia.

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Rhododendron minus var. chapmanii (syn. Rhododendron chapmanii), also known as Chapman's rhododendron, is an endangered variety, endemic to Florida, of the evergreen Piedmont rhododendron.