Flora of Prince Edward Island

Crataegus jonesiae is a species of hawthorn native to New England and Canada. It is named in honor of landscape architect Beatrix Jones Farrand, who first noticed it and brought it to Charles Sprague Sargent's attention.

Symphyotrichum laurentianum (formerly Aster laurentianus) is a critically imperiled species of flowering plant in the family Asteraceae endemic to the southern shores of the Gulf of St. Lawrence in Canada. Commonly known as Gulf of St. Lawrence aster, it is an annual, herbaceous plant with one stem and no ray florets that grows up to about 13 centimetres (5 inches) tall.

Bidens heterodoxa, the Connecticut 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 (Connecticut). Bidens heterodoxa is an annual herb up to 50 cm (20 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.

Empetrum eamesii, common name purple crowberry, is a North American species of dwarf evergreen shrub.

Lysimachia × commixta is a hybrid of flowering plant in the primrose family Primulaceae. It is native to eastern North America, from eastern Canada across the Great Lakes region west to Minnesota. The hybrid specific epithet commixta means "mixed together, mixed up", which presumably refers to the genetic mixing of two species. Indeed, the hybrid is sometimes referred to as the mixed loosestrife or the commingling loosestrife.

Salicornia maritima, the sea glasswort or slender glasswort, is a succulent, salt-tolerant plant found along the eastern coast of North America, including Maine and New Brunswick. It produces flowers towards late summer or beginning of fall. This plant is sometimes mistaken for Salicornia depressa.

Corema conradii is a species of flowering plant in the heath family known by the common name broom crowberry. It is native to eastern North America, where it has a disjunct distribution, occurring intermittently from Nova Scotia to Massachusetts, in the Shawangunk Mountains of New York, and in the Pine Barrens of New Jersey. Studies indicate that the plant might be a hybrid between ancestral populations of Corema album and Ceratiola.

Triglochin gaspensis (common name - Gaspé Peninsula arrow grass) is a species of flowering plant in the family Juncaginaceae, native to eastern Canada (New Brunswick, Newfoundland island, Nova Scotia, Prince Edward Island and Quebec), and Maine in the north-eastern United States, where it is found growing in the tidal zone of the Atlantic coast below the high-water mark. It was first described by Helmut Lieth and Doris Löve in 1961.

Iris hookeri, commonly called the beach head iris, is a species of Iris. It is endemic to sea coasts and beaches in Maine, in the Northeastern United States and also eastern Canada. It blooms in July. It was first published by the English botanist George Penny in Hort. Brit. (edited by J.C.Loudon), edition 2 on page 591 in 1832, based on an earlier description by George Don. The Latin specific epithet hookeri refers to the English botanist William Jackson Hooker. It is found in Eastern Canada within the states of Québec, Nova Scotia, Prince Edward Island, New Brunswick, Newfoundland and

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.

Corema is a genus of two species of flowering plants in the family Ericaceae. They are dioecious small shrubs.

Packera schweinitziana, commonly called New England groundsel, is a species of flowering plant in the aster family (Asteraceae). It is native to eastern North America, where it is primarily found in eastern Canada and the northeastern United States, with disjunct populations in North Carolina and Tennessee on Roan Mountain. Its natural habitat is in sunny, wet areas, often in acidic soil. In the southeastern United States, its habitat is restricted to Appalachian balds. Packera schweinitziana is a perennial growing to around 70 cm tall, and is occasionally rhizomatous. It produces heads of

Rumex persicarioides is a flowering dicot species in the family Polygonaceae. This species flowers annually in the summer-time but on rare occasions it has been found to be biennial. R. persicarioides is not cultivated for human use and should not be confused with the similarly named genus Persicariae.

Solidago macrophylla, the largeleaf goldenrod or large-leaved goldenrod, is North American species of herbaceous perennial plants of the family Asteraceae. It is native to eastern and central Canada (from Ontario to Newfoundland & Labrador) and the north-eastern United States (New York and New England). Some of the populations in Québec and Labrador lie north of the Arctic Circle. Solidago macrophylla is a perennial herb up to 105 cm (42 inches) tall, with a thick woody rhizome. Leaves can be up to 15 cm (6 inches) long. One plant can produce 110 or more small yellow flower heads, mostly on

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.

Amelanchier interior or Wiegand's shadbush is type of serviceberry shrub. It produces a sweet tasting edible fruit called a pome, which can be eaten raw or cooked. The fruit has a sweet flavor. This species is a deciduous tree. It grows on hillsides and banks of streams and reaches up to nine meters. The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and can grow in heavy clay soil. It can grow in acid, neutral and alkaline soils, as well as shade or semi-shade. It requires moist soil.

Rosa nitida, also known as shining rose due to its glossy leaves (nitidus is Latin for 'shining'), is a perennial shrub in the rose family Rosaceae native to northeastern North America.

Argentina pacifica, sometimes called pacific silverweed, silverweed cinquefoil, or simply silverweed, is a low-growing perennial plant with pinnate leaves and yellow flowers. The edible roots were valued by indigenous peoples of the Pacific Northwest Coast.

Oclemena × blakei, commonly known as Blake's aster, is a hybrid of flowering plant in the aster family Asteraceae. It is native to northeastern North America. Its parent species are Oclemena acuminata and Oclemena nemoralis.

Carex silicea, known as beach sedge, is a species of sedge native to North America. It is found in the northeastern United States and southeastern Canada.

Neottia auriculata (syn. Listera auriculata), the auricled twayblade, is a species of terrestrial orchid found in northeastern North America (Labrador, New Brunswick and Maine west to Manitoba and Minnesota.

Polygonum fowleri, commonly called Fowler's knotweed or Hudsonian knotweed, is a plant species native to the seashores of the northern part of North America. It has been reported from every Canadian province and territory except Alberta and Saskatchewan, as well as from Maine, Alaska, Washington, Oregon, California, and Saint Pierre and Miquelon. It is usually found in gravelly locations along the seacoast. Polygonum fowleri is a prostrate to ascending herb, often with zigzagged stems. Inflorescences are in the axils of the leaves, each with up to 10 white or pink flowers. Subspecies Two

Rhododendron canadense, the rhodora or Canada rosebay, is a deciduous flowering shrub that is native to northeastern North America.

Arenaria humifusa is a species of flowering plant belonging to the family Caryophyllaceae. Its native range is Subarctic to Northeastern Canada.

Hudsonia ericoides is a species of flowering plant in the rock-rose family known by the common names pine barren goldenheather, false heather, and golden-heather. It is native to eastern North America, where its distribution extends down the east coast from Newfoundland to Delaware, with a disjunct population in South Carolina.

Amelanchier bartramiana is a species of serviceberry. Common names include mountain serviceberry, mountain shadbush, Bartram's serviceberry, mountain juneberry, Bartram juneberry, and the oblongfruit serviceberry. The leaves of A. bartramiana are either brown or green coloured, are egg-shaped and tapered at both ends with fine teeth almost to the base. It has 6–12 teeth while its lateral veins comes 10–16 pairs. Its petioles are 2–10 millimetres (0.079–0.394 in) long while its blades are ovate and elliptic. The flowers have five white petals, appearing singly or in clusters of up to four

Symphyotrichum novi-belgii (formerly Aster novi-belgii), commonly called New York aster, is a species of flowering plant. It is the type species for Symphyotrichum, a genus in the family Asteraceae, whose species were once considered to be part of the genus Aster. Plants in both these genera are popularly known as Michaelmas daisy because they bloom around September 29, St. Michael’s Day. The Latin specific epithet novi-belgii (literally "New Belgium") refers not to modern Belgium, but the 17th century Dutch colony New Netherland which was established on land currently occupied by New York

Spergularia canadensis is a species of flowering plant in the family Caryophyllaceae, known by the common name Canadian sandspurry. It is native to North America, where it is known from mainly coastal habitat. It is found along the coastline of Canada and northern parts of the United States, from Alaska to northern California on the West Coast, and as far south as New York on the East Coast. This is a plant of wet, often saline substrates, such as beaches, salt marshes, and brackish estuaries. It is an annual herb producing a slender or thick stem up to 25 centimeters (9.8 in) long, which is

Gaylussacia bigeloviana, also known as the northern dwarf huckleberry or in French as the gaylussaquier de Bigelow, is a plant species native to the coastal plains of eastern Canada and the eastern United States. It grows from Newfoundland to South Carolina in swamps and marshes, including acidic bogs alongside Sphagnum peatmosses.

Amelanchier intermedia, also known as intermediate serviceberry, shadbush or juneberry, is a wetland shrub, thought to be a hybrid of A. canadensis and A. laevis. It is distinguished from A. canadensis by its sparser pubescence, and from A. laevis by the weaker red colouration.