Flora of District of Columbia

Phacelia covillei (Coville's phacelia, buttercup scorpionweed) is a North American species of annual forbs in the family Hydrophyllaceae. It is native to the eastern and central United States in scattered locations from Missouri to Maryland and North Carolina.

Chrysogonum virginianum, the golden-knee, green and gold, or goldenstar, is a North American species of plants in the family Asteraceae. It is native to the eastern United States from New York State and Rhode Island south to Louisiana and the Florida Panhandle. The species is sometimes grown as a perennial ornamental because of its showy flowers. It is usually propagated by root cuttings. Varieties Formal botanical varieties of wild populations: Chrysogonum virginianum var. australe (Alexander ex Small) H.E.Ahles - Florida, Georgia, Alabama, Mississippi, Louisiana Chrysogonum virginianum var.

Micranthemum micranthemoides (syn. Hemianthus micranthemoides), commonly known as Nuttall's mudflower is an extinct species of subaquatic Micranthemum that previously inhabited wet areas from Virginia to New York. It is commonly misidentified as a similar species, Micranthemum glomeratum, in aquascaping.

Draba ramosissima, the branched draba, is a species of flowering plant in the family Brassicaceae. It has a restricted range, being found only on calcareous cliffs of the Appalachian Mountains, the Kentucky River Palisades, and Middle Tennessee. It is a small perennial herb with racemes of white flowers in the spring.

Pycnanthemum flexuosum, commonly known as savanna mint, or savanna mountain-mint, is an herbaceous perennial plant native to the southeastern United States.

Clematis ochroleuca is a species of flowering plant in the buttercup family, Ranunculaceae, known by the common names curlyheads and erect silky leather-flower. It is native to North America with a distribution on the east coast of the United States from Long Island to northern Georgia.

Desmodium × humifusum is a species of flowering plant in the legume family known by the common names trailing tick-trefoil, eastern trailing tick-trefoil, and spreading tick-trefoil. It is native to the eastern United States, where it has been reduced to scattered populations in the states of Massachusetts, Connecticut, and Indiana. It once had a wider distribution but it has likely been extirpated from Delaware, Maryland, New Jersey, New York, Rhode Island, Virginia, West Virginia, and Missouri. This plant is prostrate, its hairy stems trailing up to 2 metres (7 ft) long. One plant may have

Linum floridanum, known commonly as Florida yellow flax or yellow-fruited yellow flax, is a species of flowering perennial native to North America. There are two variations of this species: L. floridanum var. chrysocarpum and L. floridanum var. floridanum. The range of both variations reaches from the southeastern region of North Carolina to Florida and westward to southern Mississippi. Outside of this range, L. floridanum var. floridanum may additionally be found in the West Indies and Louisiana. L. floridanum reaches a height between 3 and 8 decimeters (approximately 0.98 to 2.62 feet),

Arabis patens, commonly called spreading rockcress, is a species of flowering plant in the mustard family (Brassicaceae). It is a short-lived biennial forb native to North America. Its natural habitat is xeric soil, often on calcareous substrates. It produces white flowers in the spring. The species was first described in 1819 by William Starling Sullivant and placed in the genus Arabis. In 2003 Ihsan Ali Al-Shehbaz moved the species, along with the other North American species of Arabis, to genus Boechera based on genetic and cytological data. In phylogenetic study published in 2010, Koch et

Juncus longii is a species within section Graminifolii—distinguished by its flat, septae-less leaves and rounded capsules arranged in glomerules—Juncus longii stands out for its particularly dense and compact inflorescence. It also features elongate rhizomes with well-spaced rhizome scales, further setting it apart from other species in the section.

Zizia trifoliata, known by the common name of meadow alexanders, is a member of the carrot family, Apiaceae. It is a perennial herb, native primarily to the Appalachian Mountains in the southeastern United States, but is less commonly found throughout Georgia, Florida, Alabama, and Arkansas.

Smilax pseudochina is a perennial species of herb in the greenbriar family. It is commonly called bamboo vine or false chinaroot. Its range extends up the Atlantic Coast of the United States, from Long Island in New York State south to Georgia.

Vernonia glauca, Upland Ironweed, Appalachian Ironweed, of Broadleaf Ironweed, is a species of herbaceous perennial flowering plant in the family Asteraceae. It is endemic to the eastern United States. V. glauca has been observed growing in habitats such as creek margins, wetlands, and woodlands.

Arnica acaulis is a North American species of plants in the sunflower family, known by the common name common leopardbane. It is native to the southeastern and east-central parts of the United States, from Alabama and Florida north to New Jersey and Pennsylvania.

Ripariosida is a genus of flowering plants belonging to the family Malvaceae. It includes a single species, Ripariosida hermaphrodita, a perennial native to southeastern Canada (Ontario) and the east-central United States (District of Columbia, Indiana, Kentucky, Maryland, Michigan, Ohio, Pennsylvania, Virginia, and West Virginia).

Vitis rupestris is a species of grape native to the United States that is known by many common names including July, Coon, sand, sugar, beach, bush, currant, ingar, rock, and mountain grape. It is used for breeding several French-American hybrids as well as many root stocks.

Euphorbia ipecacuanhae, known by the common names of Carolina ipecac, American ipecac, and ipecac spurge, is a member of the spurge family, Euphorbiaceae. It is a perennial herb, native to the seaboard of the eastern United States, from South Carolina to Long Island. Though it is not closely related to its namesake, Carapichea ipecacuanha, it was often used for the same purpose, with the deep taproot used to create a powerful emetic as a local substitute for imported syrup of ipecac.

Eryngium aquaticum is a species of flowering plant in the family Apiaceae known by the common name rattlesnakemaster, marsh rattlesnake master, corn-snakeroot, bitter snakeroot, and marsh eryngo. This plant is native to eastern North America. This biennial or perennial herb grows up to 2 meters (6 ft 7 in) tall. The ribbed, erect stem branches toward the top. There are alternately arranged leaves which are lance-shaped and toothed on the edges. The basal leaves may be up to 90 centimeters (35 in) long by 9 cm (3.5 in) wide. The inflorescence contains white to blue flower heads with spiny,

Triantha racemosa, commonly called the coastal false asphodel or southern bog asphodel, is a species of flowering plant in the Tofieldia family. It is native to the Coastal Plain of the Southeastern United States, although there are a few disjunct populations inland. It is found in acidic wetlands, including wet barrens and savannas. Triantha racemosa produces a raceme of white flowers in mid-summer. An intermediate population that suggests a transition to the more northern Triantha glutinosa is found in the New Jersey Pine Barrens.

Ripariosida is a genus of flowering plants belonging to the family Malvaceae. It includes a single species, Ripariosida hermaphrodita, a perennial native to southeastern Canada (Ontario) and the east-central United States (District of Columbia, Indiana, Kentucky, Maryland, Michigan, Ohio, Pennsylvania, Virginia, and West Virginia).

Oxalis grandis, commonly known as great yellow woodsorrel or large yellow wood sorrel, is an annual plant and herb in the woodsorrel family. It is native to the eastern United States from Georgia north to Pennsylvania and Wisconsin, west as far as Louisiana. It blooms from May to June with yellow flowers and grows in sandy woods or alluvial soils.

Smilax maritima is a North American species of plants native to the south-eastern United States from Texas to North Carolina.

Scutellaria serrata, commonly known as showy skullcap or serrate skullcap, is a species of flowering plant in the mint family (Lamiaceae). It is a perennial herb native to the eastern United States, where it occurs in rich forests and other upland wooded habitats.

Cyperus hystricinus is a species of sedge that is native to southern parts of North America. This species has been observed growing in sandhill communities and pine communities. It has displayed preference for sandy soils and sunny conditions.

Ribes rotundifolium is a North American species of currant known by the common names wild gooseberry and Appalachian gooseberry. It is native to the eastern United States, primarily the Adirondacks, from Massachusetts and the Appalachian Mountains south as far as South Carolina and Tennessee. Ribes rotundifolium is a shrub up to 150 cm (5 ft) tall, with cream-colored, pinkish or pale green pink flowers and dark blue or dark purple berries. Berries are sweet, pale purple berries.

Polygonum glaucum, common names seabeach knotweed and seaside knotweed, is a North American species of plant in the buckwheat family. It grows on the Atlantic Coast of the United States, from Alabama to Massachusetts, including in salt-water inlets such as Chesapeake Bay and the Hudson River. Polygonum glaucum is a branching herb up to 70 cm (28 in) tall. It appears silvery of bluish-green because of wax covering the leaves and stem. Flowers are pink or white, produced in groups of 1–3. It grows on beaches, sand dunes, and the edges of coastal marshes.

Cyperus refractus is a species of sedge that is native to south eastern parts of North America.

Opuntia humifusa, commonly known as the devil's-tongue, eastern prickly pear or Indian fig, is a cactus of the genus Opuntia present in parts of the eastern United States, southeastern Canada, and northeastern Mexico.

Chrysogonum is a genus of flowering plants in the family Asteraceae. As of May 2024, two circumscriptions of the genus were in use. In the broader circumscription, the genus has a discontinuous distribution, with species native to eastern North America and Madagascar. In the narrower circumscription, the genus contains only species native to eastern North America.

Nyssa aquatica, commonly called the water tupelo, cottongum, wild olive, large tupelo, tupelo-gum, or water-gum, is a large, long-lived tree in the tupelo genus (Nyssa) that grows in swamps and floodplains in the Southeastern United States. Nyssa aquatica trunks have a swollen base that tapers up to a long, clear bole, and its root system is periodically underwater. Water tupelo trees often occur in pure stands.