Flora of Rhode Island

Rubus prosper is a rare North American species of brambles in the rose family. It has been found in the State of Rhode Island in the northeastern United States. The genetics of Rubus is extremely complex, so that it is difficult to decide on which groups should be recognized as species. There are many rare species with limited ranges such as this. Further study is suggested to clarify the taxonomy.

Eupatorium novae-angliae, commonly called New England boneset, New England justiceweed or New England thoroughwort, is a rare and endangered North American species in the family Asteraceae. It is found only in 4 counties in southern New England (Plymouth and Barnstable Counties in Massachusetts, plus Newport and Washington Counties in Rhode Island). The species is listed as endangered species in both states. Specimens of Eupatorium novae-angliae have been collected for many years, classified by botanists as the more widespread species E. leucolepis, found from Long Island to Texas. More

Crocanthemum dumosum, common known as bushy frostweed and bushy rockrose, is a perennial plant that is native to the United States.

Sagittaria teres, the quill-leaved arrowhead or slender arrowhead, is an aquatic plant species in the genus Sagittaria. It is a perennial herb up to 80 centimetres (31 inches) tall. The leaves can grow both under and above the water. The flowers are white, up to 1.5 cm (1⁄2 in) in diameter, borne in one or more whorls on a stalk rising above the leaves. It is native to the northeastern United States: Rhode Island (Providence and Washington Counties), Massachusetts, New Hampshire (Hillsborough County), New York (Suffolk County) and New Jersey. It grows along the shores of lakes, marshes, and

Pityopsis falcata, commonly known as sickleleaf silkgrass, sickle-leaved golden aster, and New England Golden aster, is perennial plant in the family Asteraceae native to the northeastern Atlantic Coastal Plain of the United States.

Sabatia kennedyana is a species of flowering plant in the gentian family known by the common name Plymouth rose gentian. It is native to eastern North America. It has a disjunct distribution, occurring in Nova Scotia, Massachusetts, Rhode Island, Virginia, North Carolina, and South Carolina.

Scirpus longii is a species of flowering plant in the sedge family known by the common name Long's bulrush. It is native to eastern North America, where it is limited to the Atlantic coastal plain. This perennial plant grows from a large rhizome and forms clumps of stems up to 1.5 meters tall. It flowers rarely, any time between May and August. The inflorescence is an open cyme of spikelets up to about a centimeter long. This species grows in wetlands such as river banks and bogs.

Coreopsis rosea, known as the pink tickseed, is a North American species of Coreopsis in the family Asteraceae. It has a discontinuous distribution in the eastern United States and Canada, found in Nova Scotia, Massachusetts, Rhode Island, New York, New Jersey, Pennsylvania, Delaware, Maryland, Georgia, and South Carolina. Coreopsis rosea grows in wet areas such as marsh edges. Unlike most Coreopsis species, the ray florets are pink or white (instead of yellow). The only other Coreopsis species with pink rays is C. nudata; C. rosea does not seem to be closely related to Coreopsis species

Bidens eatonii (Eaton's beggarticks) is a North American species of flowering plant in the family Asteraceae. It is native to eastern Canada (Québec, New Brunswick, Prince Edward Island) and the northeastern United States (Maine, Massachusetts, Connecticut, New York, New Jersey). Bidens eatonii is an annual herb up to 150 cm (60 inches) tall. It produces as many as 3 flower heads containing yellow disc florets but usually no ray florets (occasionally 1, 2, or 3). The species grows mostly along the banks of estuaries and coastal salt marshes.

Prunus maritima, the beach plum, is a species of plum native to the East Coast of the United States. It is a choice wild edible and its few pests and salt tolerance make it a resilient fruit crop for degraded lands and urban soils.

Amaranthus pumilus, the seaside amaranth or seabeach amaranth, is a species of amaranth. This annual plant is now a threatened species, although it was formerly scattered along the eastern coast of the United States, its native range.

Sclerolepis is an aquatic plant native to the eastern United States. It has only one known species, Sclerolepis uniflora, the pink bogbutton. It lives in ponds and other wet areas. When water is abundant, the plant lives underwater, with long stems and flaccid, elongated leaves, and does not flower. When the water level drops, it assumes a form more familiar in terrestrial plants, with an erect stem, and flowers in summer to fall. The flowers are pink. Sclerolepis is fairly common in the southeastern United States, from Alabama and Florida to North Carolina, and has more sparse distribution

Carex polymorpha common names variable sedge and many forms sedge, is a perennial species of Carex native to North America.

Amelanchier nantucketensis, also known as the Nantucket serviceberry or the Nantucket shadbush, produces edible fruit called pomes. Nantucket serviceberry is of conservation concern in the wild. Its distribution extends from Nantucket and Martha's Vineyard to Long Island and Staten Island. There are scattered occurrences in Maryland, Virginia, Maine, and Nova Scotia. This shrub grows 2 to 5 feet tall. It forms colonies by extending stolons. It produces cream-colored flowers and blue fruits. The plant grows in dry, sandy, sunny habitat, including pine barrens and grasslands. The plant is

Symphyotrichum tradescantii (formerly Aster tradescantii) is a species of flowering plant in the family Asteraceae native to northeastern North America. Common names include Tradescant's aster and shore aster.

Sagittaria filiformis, the threadleaf arrowhead, is a perennial aquatic plant growing up to 170 centimetres (67 inches) tall. Some leaves are thread-like, entirely underwater, but others are narrowly ovate or lanceolate and floating on the surface. The species is native to the eastern United States, from Maine south to Florida and Alabama. It occurs in flowing streams in the northern part of its range, but more stagnant waters such as marshes and swamps in the South.

Carex collinsii, common name Collins' sedge, is a species of Carex native to North America. It is listed as a special concern species and believed extirpated in Connecticut. It is listed as endangered in New York, as threatened in Pennsylvania, and its historical range included Rhode Island.

Ranunculus allegheniensis is a species of flowering plant in the buttercup family, Ranunculaceae. Its common names include Allegheny Mountain buttercup and Allegheny crowfoot. It is found in the northeastern United States, in and around the northern segments of the Appalachian mountains., particularly in areas of high pH bedrock.

Gaylussacia frondosa is a species of flowering plant in the heath family known by the common names dangleberry and blue huckleberry. It is native to the eastern United States, where it occurs from New Hampshire to South Carolina. This shrub grows up to two meters (80 inches) tall. The plant spreads via rhizome, sprouting up new stems to form colonies. The leaves are up to 6 centimeters (2.4 inches) long by 3 cm (1.2 inches) wide. They are hairy and glandular. The inflorescence contains 1 to 4 flowers that hang on pedicels up to 2 centimeters (0.8 inch) long. The flower is bell-shaped and

Schoenoplectus etuberculatus, common name Canby's bulrush, is a plant species native to the United States. It is reported from every state on the Gulf and Atlantic coasts from eastern Texas to Delaware, plus isolated populations in Rhode Island (one population in Town of South Kingstown, Washington County) and Missouri (Oregon County). It is an emergent plant growing in ponds, marshes, stream banks, etc., including in brackish water along the coast. Schoenoplectus etuberculatus is a mat-forming perennial herb spreading by means of underground rhizomes. Culms are up to 2 m (80 inches) tall,

Lycopus amplectens, common names clasping-leaved water-horehound, sessile-leaved bugleweed, and sessile-leaved water-horehound, is a species of Lycopus native to North America. Its native range stretches from Massachusetts south to northeastern Florida.

Bolboschoenus novae-angliae, common names New England bulrush and Salt march bulrush, is a plant species found along the Atlantic seacoast of the United States from Alabama to Maine (although there are no records of the plant from South Carolina, and reports from Alabama, Georgia, and North Carolina remain unconfirmed). It grows in brackish and salt-water marshes and estuaries along the coast. Bolboschoenus novae-angliae is a perennial herb up to 150 cm (80 inches) tall, spreading by means of underground rhizomes. Culms are triangular in cross-section. Flowers and fruits are borne in

Eurybia spectabilis, commonly known as the eastern showy aster, simply showy aster or purple wood aster, is an herbaceous perennial native to the eastern United States. It is present along the coastal plain of the U.S. where it is most often found growing in dry, sandy soils. Although it is not considered threatened due to its extensive range, it is locally endangered in many states. The flowers appear in the fall and show ray florets that are a violet-purple and yellow disc florets. It is one of the parent species of the hybrid Eurybia × herveyi.

Drosera filiformis, commonly known as Tracy's sundew, dewthread or the thread-leaved sundew, is a small, insectivorous, rosette-forming species of perennial herb. A species of sundew, it is unusual within its genus in that the long, erect, filiform (thread-like) leaves of this plant unroll in spirals – an arrangement similar to the circinate vernation seen in ferns.

Carex vestita, also commonly known as velvet sedge, is a tussock-forming species of perennial sedge in the family Cyperaceae. It is native to eastern parts of the United States.

Stachys hyssopifolia, commonly known as hyssop-leaf hedge-nettle, rough hedge-nettle hyssop-leaved hedgenettle, and hyssop hedge-nettle is a species of flowering plant in the mint family (Lamiaceae).

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.

Lechea maritima, also known as beach pinweed, is a herbaceous perennial plant in the Cistaceae family found along coastal sandy dunes of the East Coast of the United States and into Atlantic Canada.

Crataegus fluviatilis is a species of hawthorn similar to C. flabellata and to C. macrosperma. The name C. apiomorpha has been applied to a form of the species that is most similar to C. macrosperma.

Malaxis bayardii, or Bayard's adder's-mouth orchid, is a species of orchid native to northeastern North America. It is found from Massachusetts to North Carolina, with isolated populations in Ohio and Nova Scotia. There are historical reports of the plant formerly growing in Vermont and New Jersey, but it seems to have been extirpated in those two states It grows in dry, open woods and pine barrens at elevations of less than 600 m (2000 feet). Malaxis bayardii is a terrestrial herb up to 26 cm (10.4 inches) tall. It produces a pseudobulb up to 20 mm in diameter. It generally has only one