Flora of Maine

Carex oronensis is a species of sedge known by the common name Orono sedge. It is endemic to Maine in the United States, where it occurs mainly in the Penobscot River Valley. It is the only plant that is endemic to the state of Maine. The type locality is Orono. The Orono sedge produces clumps of stems up to one meter tall. There are three to four leaf blades per stem. Each measures 18 to 23 centimeters long. The copper-colored inflorescence is a few centimeters long and contains several spikes of flowers. Flowering occurs in June and July. This plant grows in wetlands and in less wet areas.

Amsinckia douglasiana is an uncommon species of flowering plant in the family Boraginaceae, known by the common name Douglas' fiddleneck. It is endemic to the coastal Santa Monica Mountains and Santa Ynez Mountains of southern California.

Pedicularis furbishiae, or Furbish's lousewort, is a perennial herb found only on the shores of the upper Saint John River in Maine and New Brunswick. Furbish's lousewort was first recognized as a new species by Maine naturalist and botanical artist Kate Furbish (who named it Furbish's wood betony) in 1880. It is considered an endangered species in the United States and Canada, and is threatened by habitat destruction, as well as riverside development, forestry, littering and recreational use of the riverbank. It was formerly in the family Scrophulariaceae, but is now placed in the family

Carex waponahkikensis, commonly known as the Dawn-land sedge, is a species of sedge first described by M. Lovit and A. Haines in 2012. It is native to a small range in the state of Maine as well as in adjacent parts of coastal New Brunswick.

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 anticostense (formerly Aster anticostensis) is a species of flowering plant in the family Asteraceae with the common name of Anticosti aster. It is endemic to Quebec, New Brunswick, and Maine. S. anticostense is a perennial, herbaceous plant that may reach 10 to 90 centimeters (4 to 35 inches) in height. Its flowers have pale purple or lilac, sometimes white, ray florets and yellow, then reddish purple, disk florets.

Agalinis neoscotica, commonly known as Nova Scotia false foxglove, is a species of false foxglove. It is found in southwestern Nova Scotia along the coastal plain and neighbouring islands and in the southeastern portion of Maine.

Taraxacum latilobum, also known as the large-lobed dandelion, is a species of dandelion found in eastern North America native to Maine, Newfoundland, and Quebec. The roots and leaves were part of the traditional plant foods of Canadian indigenous peoples. Along with the St. Lawrence dandelion (Taraxacum laurentianum), Taraxacum latilobum has been found in the Mingan Archipelago, a biodiversity hotspot in Quebec.

Nabalus boottii, commonly known as alpine rattlesnake root or Boott's rattlesnake root, is a species of alpine perennial plant in the family Asteraceae endemic to the northeastern United States. The specific epithet boottii is named after the Bostonian botanist John Wright Boott, who first collected the plant in the White Mountains of New Hampshire in 1829.

Acer × freemanii, Freeman's maple or Freeman maple, is a naturally occurring hybrid maple that is the result of a cross between Acer rubrum (red maple) and Acer saccharinum (silver maple). Wild specimens are found in eastern North America where the parent species overlap. The species is named after Oliver M. Freeman of the U.S. National Arboretum who hybridized A. rubrum with A. saccharinum in 1933. The fall foliage is a striking orange-red. It has many commercially available cultivars and is frequently used as a street tree.

Solidago leiocarpa, common name Cutler's alpine goldenrod, is a plant species native to mountainous portions of Québec, northern New England, and northern New York State. It is generally found at elevations over 800 m (2400 feet). Solidago leiocarpa is closely related to the more widespread S. multiradiata, distinguished by the shape of the phyllaries surrounding the flower heads. Solidago leiocarpais a perennial herb up to 35 cm (14 inches) tall. One plant can have as many as 160 small yellow flower heads in a flat-topped or conical array.

× Sorbaronia is a hybrid genus of flowering plants belonging to the family Rosaceae. The hybrids are between species of Sorbus and Aronia. It is native to Eastern Canada. In addition, × Sorbaronia fallax has been created artificially.

Salix argyrocarpa is a species of willow native to northeastern North America.

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.

Hieracium robinsonii, or Robinson's hawkweed, is a North American plant species in the tribe Cichorieae within the family Asteraceae. It is native to eastern Canada and the northeastern United States (Québec, New Brunswick, Nova Scotia, Maine, and New Hampshire). There are reports of it formerly growing in Newfoundland, but it does not appear to grow there now. Hieracium robinsonii is an herb up to 35 cm (14 in) tall with star-shaped hairs, with leaves both on the stem and in a rosette at the bottom. Leaves are up to 80 mm (3.1 in) long, with no or only a few hairs on the upper surface and

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.

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.

Rubus permixtus is a North American species of dewberry in the genus Rubus, a member of the rose family. It grows in scattered locations in the north-central and northeastern United States, from Maine south as far as West Virginia plus Michigan and Wisconsin. Nowhere is it very common. Rubus permixtus is a nearly prostrate shrub that runs along the ground as much as 6 feet (180 cm), with vertical stems arising from those on the ground. Fruits are generally black, sweet, and edible.

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

Rubus biformispinus, the pasture dewberry, is an uncommon North American species of flowering plant in the rose family. It is found in eastern and central Canada (from Ontario to Nova Scotia) and the northeastern United States (Maine, New York, Pennsylvania). The epithet biformispinus means "with spines of two shapes," referring to the two distinct sizes of prickles on the stems. 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

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

Polemonium vanbruntiae is a species of flowering plant in the phlox family Polemoniaceae. It is known by the common names Appalachian Jacob's ladder, bog Jacob's-ladder, and Vanbrunt's polemonium. It is native to eastern Canada and the northeastern United States.

Crataegus brainerdii is a species of flowering plant in the rose family known by the common name Brainerd's hawthorn. It is named for Ezra Brainerd (1844–1924), a renowned botanist and former president of Middlebury College, in Vermont. It is native to eastern North America, including eastern Canada and the eastern United States. This species is a shrub or small tree growing up to 30 feet tall. The branches are lined with thorns up to 1.6 inches long. The serrated leaves are somewhat triangular in shape and sometimes slightly lobed. They are hairy when new. The flowers are borne in clusters.

Bidens hyperborea is a species of flowering plant in the family Asteraceae commonly known as estuary beggarticks, northern beggarticks, or estuary bur-marigold. Known from marshes and estuarine regions in northeastern North America, it is a variable annual herb with yellow flowers similar to Bidens cernua, Bidens laevis, and Bidens eatonii. B. hyperborea is listed as an endangered species in the state of Massachusetts, where it is threatened by habitat degradation, and is listed by NatureServe as critically imperiled (S1) in the province of Ontario and possibly extirpated from New Hampshire.

Vaccinium caesariense (New Jersey blueberry) is a Vaccinium species native to the Eastern United States.

Paronychia argyrocoma, the silvery nailwort or silverling, is a plant species native to the eastern United States. It has a disjunct distribution, found in New England (Maine, New Hampshire, Vermont and Massachusetts) and the Appalachian Mountains of the Southeast (Georgia, Tennessee, Kentucky, North Carolina, Virginia, West Virginia and Maryland) but not from New York, New Jersey or Pennsylvania in between. The species grows on rocky sites at elevations of 200–1800 m. Paronychia argyrocoma is a perennial herb with a woody caudex, forming mats covering significant areas of ground. Stems are

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.

Vaccinium boreale, common name northern blueberry, sweet hurts, or bleuet boréal (in French), is a plant species native to North America.

Polystichum × potteri, known as Potter's holly fern, is a hybrid between Polystichum braunii and Polystichum acrostichoides. It is named for Henry Potter, a Vermont farmer and botanist.