Flora of New Hampshire

Potentilla robbinsiana, the dwarf mountain cinquefoil or Robbins' cinquefoil, is a small yellow-flowered perennial growing exclusively above the tree line in the White Mountains of New Hampshire. It is nearly stemless and measures two to four centimeters in diameter.

Geum peckii, commonly known as mountain avens, Eastern mountain avens, Peck's avens, or Benoîte de Peck in French, is a species of herbaceous, perennial flowering plant in the rose family. It is native to eastern North America, where it is known from only two locations, the White Mountains of New Hampshire and three sites in Nova Scotia. It is named after the American naturalist William Dandridge Peck, who first collected the plant on Mount Washington in 1804.

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.

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

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.

Osmunda × ruggii is a sterile hybrid between Claytosmunda claytoniana and Osmunda spectabilis.

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

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.

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

Scirpus ancistrochaetus is a rare species of flowering plant in the sedge family known by the common names barbedbristle bulrush and northeastern bulrush. It is native to the northeastern United States from New Hampshire south to Virginia. It used to be found in Quebec but it is now thought to be extirpated there. It was also believed extirpated from the state of New York, but at least one population has been rediscovered in Steuben County in 2010. It is threatened by the loss and degradation of its wetland habitat. It is a federally listed endangered species. This bulrush produces clumps of

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.

Isoetes × eatonii, or Eaton's quillwort, is a hybrid between I. engelmannii and I. tenella. It can be found in ponds and slow moving rivers in Canada or in several New England states. In Canada, it has only been found in the Severn River in Ontario. In the United States, it has been found in Pennsylvania, New Jersey, and New York. It bears 12-100 long yellowish green leaves, each fine, soft, and 8 to 45 centimeters long. The unspotted tan colored sporangium are 12 millimeters long and 5 millimeters wide. The velum covers a sixth to a quarter of the sporangium. The elongated ligule is 3.5

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

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.

Chenopodium foggii, commonly known as Fogg's goosefoot, is a species of annual herb found throughout eastern North America and particularly New England.

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.

Crataegus flabellata is a species of hawthorn known by the common name fanleaf hawthorn. It is native to the northeastern United States and adjacent Canada. It is intermediate in appearance between C. macrosperma and C. chrysocarpa. C. macrosperma, which occurs throughout the range of C. flabellata and also in the southeastern U.S., is often misidentified as C. flabellata.

Spiranthes casei, or Case's lady's tresses, is a species of orchid native to the northeastern United States and Canada.

Betula minor, the dwarf white birch, is a species of birch which can be found in Eastern Canada and in such US states as Maine, New Hampshire, and New York.

Rubus trifrons is a rare North American species of flowering plant in the rose family. It has been found only in eastern Canada (Québec and Nova Scotia) and the northeastern United States (New York, New Hampshire, Vermont). 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. Some studies have suggested that R. trifrons may have originated as a hybrid between R. setosus and R. hispidus.

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

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.

Crataegus scabrida is a species of hawthorn.

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.