Flora of Southeastern U.S.

Franklinia is a monotypic genus in the tea family, Theaceae. The sole species in this genus is a flowering tree, Franklinia alatamaha, commonly called Franklinias or the Franklin tree, and native to the Altamaha River valley in Georgia in the southeastern United States. It has been extinct in the wild since the early 19th century, but survives as a cultivated ornamental tree. In the past, some botanists have included Franklinia within the related genus Gordonia. The southeastern North American species Gordonia lasianthus differs in having evergreen foliage, flowers with longer stems, winged

Quercus acerifolia (also called maple-leaf oak) is a rare North American species of oak in the red oak section of Quercus (known as Lobatae). The species was first described in 1927 from samples collected by E.J. Palmer in the Ozark Mountains. The initial documentation classified the species as Quercus shumardii var. acerifolia. The species was first perceived as a variant of Shumard oak due to its similar foliage and ranges. Over two decades later, the tree was re-evaluated by botanists Nick Alan Stoynoff and William J. Hess, who determined that it was a distinct species. Their case for

Astragalus bibullatus, the limestone glade milkvetch or Pyne's ground plum, is an endangered species of flowering plant that is endemic to the cedar glades of the central basin of Tennessee in the United States. It is found in only eight populations located within a few kilometers of each other in Rutherford County, Tennessee.

Quercus inopina, the sandhill oak, is an uncommon North American species of oak shrub. It has been found only in the state of Florida in the southeastern United States. It is a branching shrub up to 5 meters (17 feet) in height. The bark is gray, twigs purplish brown. The leaves are broad, up to 85 millimeters (3+3⁄8 inches) long, usually hairless, with no teeth or lobes.

Harrisia fragrans is a rare species of cactus known by the common name fragrant prickly apple. It is endemic to Florida, where it is known only from St. Lucie County. The plant's habitat has been almost completely consumed by development, leading to its rarity. It is a federally listed endangered species of the United States.

Sabal etonia, commonly known as the scrub palmetto is a species of palm. It is endemic to Florida in the United States, where it is found in Florida sand pine scrub communities.

Nolina brittoniana is a rare species of flowering plant in the asparagus family known by the common name Britton's beargrass. It is endemic to Florida, where there are 72 known populations, only a few large enough to be considered viable. It is federally listed as an endangered species of the United States. This plant has no aboveground stem. It is a rosette of leaves attached at a bulblike base that arises from an underground caudex, a modified stem. The grasslike leaves are up to a meter long and rarely more than a centimeter wide. The edges are serrated with cartilaginous teeth. The

Agave decipiens, common names false Sisal or Florida agave, is a plant species endemic to coastal Florida in the United States.

Prunus geniculata is a rare species of plum known by the common name scrub plum. The species is endemic to Florida.

Harrisia aboriginum (commonly known as the west-coast prickly apple, prickly applecactus, yellow prickly apple, and aboriginal prickly apple) is a species of columnar cactus endemic to peninsular Florida, on the Gulf Coast of the counties of Lee, Sarasota County, and Charlotte. Only 12 occurrences are known, and the species is threatened by horticultural collection, shading from fire suppression, competition from invasive flora, and most of all habitat destruction. It is a federally listed endangered species of the United States.

Harperocallis flava, known by the common name Harper's beauty, is a species endemic to parts of Florida in the United States, where it is known mainly from the Apalachicola National Forest in the Panhandle. It is seriously endangered and has been on the United States' endangered species list since 1979. The wildflower was first described in 1968 and by 1979 there were only three known populations totaling fewer than 100 individuals. Two of these populations were actually close enough together to be considered one population. These were all located in the Apalachicola National Forest and the

Rhododendron vaseyi, the pinkshell azalea, is a species of flowering plant in the heath family Ericaceae. It is endemic to the Appalachian highlands of North Carolina. The specific epithet vaseyi honors the American plant collector George Richard Vasey and his father Dr. George Vasey, Chief Botanist at the United States Department of Agriculture from 1872 to 1893. The species is sometimes referred to as the Vasey Rhododendron.

Garberia is a monotypic genus of flowering plants in the family Asteraceae, containing the single species Garberia heterophylla. It is endemic to Florida in the United States, where it is distributed in the northern and central counties. The plant is known commonly as garberia and Garber's scrub starts.

Euphorbia deltoidea (syn. Chamaesyce deltoidea), also called wedge sandmat, is a species of flowering plant endemic to Florida in the United States. The taxonomy of the plant is difficult, with some authorities dividing it into four subspecies and some into three; also, it is frequently listed as a member of the old genus Chamaesyce. One subspecies, ssp. deltoidea, is a federally listed endangered species called deltoid spurge. It is found only in Miami-Dade County. Another subspecies, ssp. adhaerens, is often included with it under the name deltoidea instead of separately, making it

Asimina obovata, the bigflower pawpaw, is a shrub or small tree in the custard apple family. It is an endemic native to Florida, where it is found on open sandy hammocks and in dry woods. Showy white flowers in late winter to early summer are followed by large green edible fruit. Its pollen is shed as permanent tetrads. Along with the other members of the genus, it serves as a host plant for the zebra swallowtail butterfly and pawpaw sphinx moth.

Stachys floridana is a species of betony in the mint family, Lamiaceae. It is native to the United States, where its true native range is probably limited to Florida, but today it is known throughout the Southeast as an introduced species and common weed. It occurs as far west as Texas, and it has been recorded in California. Its common names include Florida betony, Florida hedgenettle, and rattlesnake weed. It has been called wild artichoke, but it is not closely related to artichoke. The plant was the Florida Department of Agriculture's "Weed of the Month" for February 2010.

Sagittaria secundifolia, also known as Kral's water plantain or Little River arrowhead is an endangered aquatic plant endemic to banks along the Little River of the U.S. states of Alabama and Georgia.

Isoetes tegetiformans, commonly known as mat-forming quillwort or mat-forming Merlin's grass, is an aquatic lycophyte endemic to the U.S. state of Georgia. It grows exclusively in shallow, temporary pools on granite outcrops, often with only 2 cm of soil. Only 7 populations are known to exist, and three of these have been destroyed since the plant's discovery in 1976. The remaining populations are threatened with habitat destruction due to quarrying, though the species is protected under the U.S. Endangered Species Act. New leaves quickly sprout after fall and winter rains, but during the dry

Euphorbia telephioides is a rare species of euphorb known by the common name Telephus spurge. It is endemic to Florida in the United States, where it is known only from three counties in the Panhandle. It is a federally listed threatened species of the United States. This spurge grows in coastal areas in Bay, Gulf, and Franklin Counties in Florida. It is present at about 38 known locations, with some locations newly discovered and some recently extirpated. The habitat is scrub and forest where it often grows alongside slash (Pinus elliottii) and longleaf pine (Pinus palustris) or oaks. Much

Euphorbia garberi (syn. Chamaesyce garberi) is a rare species of flowering plant in the euphorb family known by the common name Garber's spurge. It is endemic to Florida, where there are 17 known occurrences, fourteen of which are located on fourteen separate islands of the Florida Keys. The populations vary in size, with four containing fewer than 20 plants each and one containing over one million. The plant has been reduced to a small portion of its former distribution and remaining populations are threatened by a number of processes. This is a federally listed threatened species of the

Eryngium cuneifolium is a rare species of flowering plant in the carrot family known by the common names wedgeleaf eryngo, wedge-leaved button-snakeroot, and simply snakeroot. It is endemic to the state of Florida in the United States where it is known only from Highlands County. It is one of many rare species that can be found only on the Lake Wales Ridge, an area of high endemism. It was federally listed as an endangered species of the United States in 1987. This is an erect perennial herb growing 20 to 66 centimeters in maximum height. The woody taproot may be over 20 centimeters long. The

Conradina grandiflora is a species of flowering plant in the mint family known by the common name largeflower false rosemary, or large-flowered rosemary. It is endemic to Florida in the United States, where it occurs on the Atlantic Coastal Ridge. Its distribution spans Brevard, Broward, Dade, Highlands, Indian River, Martin, Osceola, Palm Beach, Polk, St. Lucie, and Volusia Counties. This aromatic shrub generally grows up to about 1.5 meters in maximum height, but it is known to reach two meters. The branches end in twigs which are coated in pale hairs. The hairy, glandular, needle-like

Carya floridana (syn. Hicoria floridana) the scrub hickory, is a small tree native to the Southeast United States, where it is endemic to central Florida.

Carex brysonii is a tussock-forming species of perennial sedge in the family Cyperaceae. It is native to parts of Alabama.

Asimina tetramera, commonly known as the four-petal pawpaw, is a rare species of small tree or perennial shrub endemic to Martin and Palm Beach Counties in the state of Florida. The species is currently listed as endangered under the Endangered Species Act and as endangered by the International Union for Conservation. The four-petal pawpaw is part of the family Annonaceae alongside other Asimina species. A. tetramera grows to between 1 and 3 meters tall with one or more branches. Mature flowers are maroon with some pink streaks and the fruit is yellow-green. It usually has six petals and four

Asclepias curtissii, or Curtiss's milkweed, is a rare species of flowering milkweed that is endemic to Florida's sandy areas. Curtiss's milkweed belongs to the subfamily Asclepiadoideae and the genus Asclepias. This dicotyledonous, perennial plant was placed on the endangered species list by the state of Florida to protect this rare milkweed. Although Curtiss milkweed is found all over Florida, the populations are very isolated and concentrated.

Stachydeoma, common name mock pennyroyal, is a genus of flowering plant in the family Lamiaceae, first described as a genus in 1903. It contains only one known species, Stachydeoma graveolens, endemic to the state of Florida in the United States. It has been found only in the northwestern part of the state, referred to colloquially as the "Panhandle."

Spiranthes sylvatica, the woodland ladies' tresses or pale-green ladies'-tresses is a terrestrial orchid endemic to the United States, very similar in appearance and range to Spiranthes praecox which it had been considered a variation of for a long time.

Sagittaria kurziana, common names springtape and strap-leaf sagittaria, is a perennial aquatic plant. It grows up to 250 centimetres (8 feet) tall. It has long, narrow, flat leaves that float on the surface of the water, up to 250 cm long but rarely more than 15 millimetres (1⁄2 inch) wide. These form huge masses of ribbon-like leaves flowing back and forth with the current. Inflorescences also float on the surface, the white flowers very often submerged. The species is native to Florida and naturalized in the Mariana Islands. It grows along large springs, very often those with high sulfur

Paronychia chartacea is a rare species of flowering plant in the family Caryophyllaceae known by the common names papery Whitlow-wort and paper nailwort. It is endemic to Florida in the United States. There are two subspecies of the plant; ssp. chartacea occurs in Central Florida, especially the Lake Wales Ridge, and ssp. minima is native to the Florida Panhandle. The two subspecies are geographically separated and do not occur together. Both are included on the federal Endangered Species List, on which the species is designated threatened. This is often an annual herb, though ssp. chartacea