Flora of Northern U.S.

Erythronium propullans, the Minnesota dwarf trout lily, Minnesota adder's tongue or Minnesota fawnlily, is a rare plant endemic to the Cannon River and North Fork Zumbro River watersheds in Rice County, Goodhue County and the extreme northern edge of Steele County, Minnesota, in the United States. The plant is closely related to the white trout lily (Erythronium albidum) and is believed to have evolved less than 9,000 years ago. It was listed as an endangered species of the United States under the Endangered Species Act in 1986. The plants flower in the spring at the same time as hepaticas,

Thismia americana, known as thismia or banded Trinity, was a species of flowering plant that was first discovered in 1912 by Norma Etta Pfeiffer in the wetlands surrounding Chicago's Lake Calumet, and described by her in 1914. The type specimen was found in what was then a wet-mesic sand prairie at 119th Street and Torrence Avenue in what would become the industrial neighborhood of South Deering. The plant has not been seen since 1916, and the ground where it was observed has since been extensively altered by industrial development. The species is believed to be extinct. Several extensive

Prunus × orthosepala is a nothospecies of shrubby plum native to North America, in the southern and central United States. It is a naturally occurring hybrid of Chickasaw plum, Prunus angustifolia, and American plum, Prunus americana, found where their ranges overlap.

Eriogonum helichrysoides, common names spreading buckwheat and strawflower wild buckwheat, is a plant species endemic to Kansas. It has been reported from only 6 counties in the west-central part of the state: Ellis, Gove, Lane, Logan, Scott, and Trego counties. The species occurs in grasslands or on clay or limestone outcrops. Eriogonum helichrysoides is a dark green shrub up to 40 cm tall and spreading to up to 80 cm across. Leaves are very narrow, up to 6 cm long but only 3 mm across. Flowers are white to rose.

Pseudognaphalium obtusifolium, synonyms including Gnaphalium obtusifolium and Pseudognaphalium saxicola, is a member of the family Asteraceae. It is found on open dry sandy habitat throughout eastern North America. Common names include old field balsam, rabbit tobacco, sweet everlasting and life everlasting. When crushed, the plant exudes a characteristic maple-syrup scent.

Quercus buckleyi, commonly known as Texas red oak, Buckley's oak, or Spanish oak is a species of flowering plant. It is endemic to the southern Great Plains of the United States (Oklahoma and Texas). Buckley's oak is smaller and more likely to be multitrunked than its close relative, the Shumard oak (Q. shumardii). The two species are interfertile, and hybrids are common along a line from Dallas to San Antonio, Texas. Texas red oak usually is 30 to 50 feet (9.1 to 15.2 meters) tall at maturity, and seldom reaches a height of more than 75 feet (23 meters). Quercus buckleyi was formerly known

Tradescantia longipes, commonly known as the wild crocus (although it is not closely related to plants in the genus Crocus), is a perennial herbaceous plant in the dayflower family. It is found only in the Ozark Mountains of southern Missouri and northern Arkansas in the Midwest United States. A spring blooming species, its flowers can be observed from April to May, typically in its preferred habitat of wooded slopes on rocky hillsides. While most other members of the genus in North America have stems reaching at least a few inches above the soil, the flowering shoots of Tradescantia longipes

Amsonia hubrichtii, commonly known as Hubricht's bluestar, Arkansas bluestar, or thread-leaf bluestar, is a North American species of perennial flowering plant in the Apocynaceae (dogbane) family, first described in 1943. It is native to Oklahoma and Arkansas in the south-central United States. It is commonly used as an ornamental plant.

Amorpha ouachitensis is an uncommon North American species of flowering plant in the legume family known by the common names Ouachita leadplant, Ouachita Mountain leadplant, Ouachita false indigo, and Ouachita indigobush. It is native to Oklahoma and Arkansas in the United States. Amorpha ouachitensis is a shrub growing up to about 2 meters (80 inches) tall. The compound leaves are each made up of several oval leaflets. The inflorescence is made up of many flowers with purple petals and yellow anthers. Amorpha ouachitensis is native to the Ouachita Mountains. In Oklahoma it occurs in Le

Trillium viride, commonly called the wood wakerobin, is a species of flowering plant in the family Melanthiaceae. It is found in the central United States, in certain parts of Missouri and Illinois. The specific epithet viride means "youthful" or "fresh-green", an apparent reference to the color of the plant's flower petals. For this reason, it is also called the green trillium, not to be confused with other green-flowered trilliums such as T. viridescens and the green form of T. sessile, both of which are found in Missouri.

Dysodiopsis tagetoides, commonly known as false dogfennel, is a species of flowering plant in the family Asteraceae. It is native to the United States, where it is restricted to Oklahoma and Texas. It is found in areas of calcareous soil. Dysodiopsis is a monotypic genus, and therefore contains no other species.

Carex perdentata, the Texas meadow sedge, is a species of flowering plant in the family Cyperaceae, native to the U.S. states of Oklahoma and Texas. A perennial of savannas and open mesic forests, it can be used as a grass substitute in lawns, but requires a great deal of water.

Vernonia lettermannii, the narrowleaf ironweed, is a plant species known only from Arkansas and Oklahoma. It grows on floodplains and terraces at elevations of 100–200 m (330–660 ft). Vernonia lettermannii is a perennial herb up to 60 cm (24 in) tall. Leaves are filiform (thread-shaped), up to 9 cm (3.5 in) long but less than 3 mm (0.12 in) wide. Flower heads are purple, arranged as a corymb.

Solidago ouachitensis is a North American species of flowering plants in the family Asteraceae known by the common name Ouachita Mountain goldenrod. It has a very limited range, found only in the Ouachita Mountains along the border between Arkansas and Oklahoma in the United States. Solidago ouachitensis is a perennial herb growing up to about 1.1 meters (44 inches) in height. It produces one or more erect stems from a woody caudex. The serrated (toothed) leaves are 10 to 13 centimeters (4.0-5.2 inches) long around the middle of the plant and smaller higher on the stem. One plant will produce

Polytaenia texana, commonly known as Texas prairie parsley, is a species of flowering plant in the carrot family (Apiaceae). It is native to Texas and Oklahoma in the United States.

Penstemon haydenii, the blowout penstemon or blowout beardtongue, is a species of flowering plant in the genus Penstemon and the family Plantaginaceae. The warm-season perennial is native to nine counties in the Nebraska Sand Hills and a single location in Carbon County, Wyoming. The plant has a milky blue color with a waxy cuticle, pale purple leaves, and an alternating leaf pattern with one central stalk. The flowers, while in the inflorescence stage, originate from the bases of the leaves of the plant. Blowout penstemon flowers from May until early June and drops its seeds from late August

Oenothera suffulta, known as roadside gaura, honeysuckle gaura, or kisses, is a flowering plant in the primrose family, Onagraceae. It is endemic to the United States, in Texas (excluding the Trans-Pecos) and southern Oklahoma.

Houstonia ouachitana, the Ouachita bluet, is a species of plants in the coffee family. It is endemic to the Ouachita Mountains of Arkansas and Oklahoma. It is an herb up to 20 cm tall, with lanceolate basal leaves and narrowly linear cauline leaves.

Hedeoma reverchonii, commonly called Reverchon's false pennyroyal, is a species of flowering plant in the mint family (Lamiaceae). It is native to the south central region of the United States, where it is primarily found in Texas, extending into small areas of Arkansas and Oklahoma. Its natural habitat is on open, calcareous rock outcrops. Hedeoma reverchonii is a robust perennial with a woody base. It produces white or lavender colored flowers in the summer. The crushed plant has an odor of camphor or lemon. This trait helps distinguish Hedeoma reverchonii from the similar-looking Hedeoma

Frasera coloradensis is a species of flowering plant in the gentian family known by the common name Colorado green gentian. It is endemic to Colorado in the United States, where it is limited to the southeastern corner of the state.

Delphinium treleasei, commonly known as named glade larkspur or Trelease's larkspur, is a perennial flowering plant found it temperate areas of the eastern United States. It is native to Missouri and Arkansas where it is often situated in limestone glades but is not common in North America. It is endemic to Ozark highlands in eight southwestern Missouri counties and eight counties in northwestern Arkansas. D. treleasei is a vascular, seed plant, part of the buttercup family (Ranunculaceae). The name Delphinium treleasei originates from the Greek "delphis" which means dolphin in reference to

Xanthisma texanum (common names the Texas sleepydaisy, star-of-Texas, and Drummond's sleepy-daisy) is an ornamental plant native to the United States. This plant is usually propagated by seeds.

Vitis × doaniana (Doan's grape) is a hybrid grape resulting from the natural hybridization of Vitis mustangensis with Vitis acerifolia. Its native range is the U.S. states of Oklahoma, Colorado, Texas, and New Mexico.

Liatris aestivalis, also known as the summer gayfeather, is a plant species in the family Asteraceae and genus Liatris. The specific epithet, aestivalis, is derived from Latin and means "pertaining to the summer".

Helenium virginicum is a rare species of flowering plant in the aster family known by the common name Virginia sneezeweed. It occurs in the United States, where it has a disjunct distribution; it is known only from Virginia and Missouri. It is limited to a specific type of habitat and it is threatened by modification of this habitat. It was federally listed as a threatened species of the United States in 1998. At the time the plant received federal protection it was known from 28 populations in two Virginia counties. Soon after, a population of similar plants was found in Missouri and by

Desmodium tweedyi is an herbaceous flowering plant in the pea family native to northern Texas and southern Oklahoma popularly known as "Tweedy's ticktrefoil" or "tick-clover." The legume or seed pod it produces has given the species its common names from its ability to cling to clothing. Along with other species in the Desmodium genus, D. tweedyi has become a candidate for soil enrichment, suppression of insect pests, mulch and green manure production, and making "good fodder for animals including bobwhite, turkey, grouse, deer, cattle and goats."

Boltonia decurrens is a rare species of flowering plant in the family Asteraceae known by the common names decurrent false aster and claspingleaf doll's daisy. It is native to the floodplains along the Illinois and Mississippi Rivers in the United States, where the habitat has been drastically altered, leading to its decline. The plant was once distributed across 400 kilometers of riverside forest from LaSalle, Illinois, to St. Louis, Missouri. As the rivers and riparian habitat alongside them have been developed, the plant's distribution has been fragmented into 40 to 43 separate

Streptanthus squamiformis is a species of flowering plant in the mustard family known by the common names pine-oak jewelflower or Goodman's jewelflower. It is a narrow endemic to Oklahoma and Arkansas.

Micranthes palmeri, commonly called Palmer's saxifrage, is a species of plant in the saxifrage family that is native to Oklahoma and Arkansas in the United States.

Helianthus × cinereus is a species of sunflower native to the United States, in Missouri, Kentucky, Indiana, and Ohio. H. cinereus was proposed as a new species by Torrey and Gray in 1842. It is a natural hybrid with similar features to artificial hybrids between Helianthus mollis and Helianthus occidentalis.