Flora of Louisiana

Iris nelsonii is a species in the genus Iris, it is also in the subgenus Limniris and in the series hexagonae. It is a rhizomatous perennial, from northern America. It has long drooping, grass-like leaves, tall stems, 10 red-purple flowers.

Oenothera lindheimeri, commonly known as Lindheimer's beeblossom, white gaura, pink gaura, Lindheimer's clockweed, and Indian feather, is a species of Oenothera. Several of its common names derive from the genus Gaura, in which this species was formerly placed. The perennial plant is native to southern Louisiana and Texas. The specific epithet is after Ferdinand Jacob Lindheimer, a German-born botanist who collected extensively in Texas for Harvard University professor Asa Gray. It is commonly grown as an ornamental plant.

Yucca cernua E.L. Keith, common name "nodding Yucca," is a rare species in the family Asparagaceae known only from a small region in Newton and Jasper Counties in eastern Texas. The epithet "cernua" and the common name "nodding yucca" both refer to the plant's nodding flowers, i.e. appearing to hang with the center pointing downward. The species often grows in disturbed habitats such as roadsides.

Trillium foetidissimum, also known as the Mississippi River wakerobin, stinking trillium, or fetid trillium, is a species of flowering plant in the family Melanthiaceae. It is found along the Louisiana–Mississippi border in a variety of habitats. Trillium foetidissimum is a perennial herbaceous plant that blooms from early March to early April.

Trillium ludovicianum, the Louisiana wakerobin or Louisiana trillium, is a species of flowering plant in the family Melanthiaceae. It is found only in the south-central United States, in Louisiana, Mississippi, and eastern Texas.

Trillium gracile, commonly known as the Sabine River wakerobin, slender trillium, or graceful trillium, is a species of flowering plant in the family Melanthiaceae. It is native to the region along the Sabine River in western Louisiana and eastern Texas. It generally grows in mature pine and hardwood forests, and on riverbanks. Trillium gracile is a perennial herbaceous plant that spreads by means of underground rhizomes. The stem has 3 bracts in a whorl well above ground, each bract up to 8.5 cm (3.4 inches) long, the blades green mottled with darker green splotches. Flowers are solitary on

Rudbeckia texana, commonly known at Texas coneflower or shiny coneflower, is a perennial plant in the family Asteraceae native to the Western Gulf coastal grasslands of Texas and Louisiana.

Liatris acidota, also known as the Gulf Coast gayfeather, sharp blazing star and sharp gayfeather, is a plant species in the family Asteraceae and genus Liatris. It is native to Louisiana and Texas in the United States, where it is found in habitats that include coastal prairies, dry prairie and savanna, where it is found in sandy to clay soils. L. acidota grows from rounded to elongated corms that produce hairless stems 20–90 centimeters tall, with some plants growing as tall 130 centimeters. Plants have purple colored flowers in dense heads forming a spike-like collection along the stems.

Pinus × sondereggeri is the only named southern pine hybrid. Its common names include Sonderegger pine and bastard pine. It is a naturally occurring cross between loblolly pine (P. taeda) and longleaf pine (P. palustris). It was originally described by H. H. Chapman (1922), who named it after its discoverer, V. H. Sonderegger, a state forester of Louisiana. This pine usually occurs singly or in small groups where both loblolly and longleaf pines overlap in range. Because both parental trees usually produce cones at the same time of year, no phenological barrier exists, thus the two freely

Bradburia hirtella is a North American species of flowering plants in the family Asteraceae, native to Texas and Louisiana in the south-central United States. Bradburia hirtella is typically annual, with some populations perennial. It is a herb up to 80 cm (32 inches) tall with yellow flower heads. Disc florets are functionally male, the female parts being fertile only in the ray florets.

Opuntia alta is a cactus species in the genus Opuntia. It is a large plant, with some older specimens forming trees to 4.6 metres (15 ft) tall. It is a naturally occurring hybrid of Opuntia engelmannii var. lindheimeri and O. stricta native to Texas and Louisiana.

Iris giganticaerulea, the giant blue iris, or Louisiana Iris, is a species of iris, in the subgenus Limniris, in the series Hexagonae. It is a rhizomatous perennial, from northern America. It has long bright green leaves, very tall stems and one or two musky fragrant flowers in a range of blue shades (pale, bright, dark, lavender and violet) or rarely white.

Astragalus soxmaniorum is a species of flowering plant in the pea family, Fabaceae. It is sometimes referred to by the common name Soxman's milkvetch, that is native to Texas, Louisiana and Arkansas in the United States of America.

Paronychia drummondii, commonly called Drummond's nailwort, is a species of flowering plant in the family Caryophyllaceae. It is native to the United States where it is restricted to the South Central region in the states of Louisiana, Oklahoma, and Texas. Its natural habitat is in sandy woodlands and openings. Paronychia drummondii is an erect annual or biennial. Its leaves are oblong to linear-lanceolate. A key characteristic is the abundance of uniform, hooked hairs at the base of the calyx. Flowers are produced from late spring to fall.

Dalea compacta, with the common name compact praireclover, is a plant of the Southwestern United States. It is a perennial herb growing up to 2 feet (0.61 metres) tall.

Coreopsis intermedia, the goldenwave tickseed, is a North American species of plants in the family Asteraceae. It is native to a small region in the south-central United States (eastern Texas, western Louisiana, southwestern Arkansas. Coreopsis intermedia is an annual or short-lived perennial up to 90 cm (3 feet) tall, with yellow flower heads containing both ray florets and disc florets.

Tradescantia reverchonii, commonly called Reverchon's spiderwort, is a species of plant in the dayflower family that is native to central and eastern Texas, western Louisiana and southwestern Arkansas in the United States. It is a perennial that produces purple or blue flowers in the spring on herbaceous stems.

Physostegia correllii is a species of flowering plant in the mint family, Lamiaceae. It is sometimes referred to by the common name Correll's false dragonhead. It is native to northern Mexico, as well as Texas and Louisiana in the United States. Most occurrences are historical and have not been seen recently. Today it is known from one location in Travis County, Texas, and two or three locations in Louisiana, and its current distribution in Mexico is unknown. This rhizomatous perennial herb may reach heights over 2 meters. It produces spikes of flowers in June through September. The flowers

Phlox cuspidata, the pointed phlox, is a species of flowering plant in the family Polemoniaceae, native to the US states of Oklahoma, Texas, and Louisiana. An annual reaching 25 cm (10 in), its hybridization dynamics with and partial reproductive isolation from Phlox drummondii are the subject of scientific inquiry.

Isoetes louisianensis, the Louisiana quillwort, is a small, grass-like aquatic plant of the family Isoetaceae. It is "one of the rarest quillworts in North America." It occurs in only five locations in St. Tammany and Washington Parishes of Louisiana, as well as some spots in southern Mississippi and south-central Alabama. It is federally listed as an endangered species, partly due to its highly restricted range. The Louisiana quillwort occurs predominantly on sand and gravel bars on small to medium-sized streams. These plants live for periods underwater. They are regularly inundated as much

Solidago ludoviciana, the Louisiana goldenrod, is a North American plant species in the family Asteraceae native to Louisiana, Texas and Arkansas. It can be found in dry open woods and along roadsides and other sunny, disturbed locations. Solidago ludoviciana can be as tall as 150 cm (5 feet). It has round to elliptic leaves and open panicles of yellow flower heads. One plant can produce as many as 140 small heads

Trillium texanum, the Texas trillium or Texas wakerobin, is a species of flowering plant in the family Melanthiaceae. It is found in east Texas, extreme southwestern Arkansas, and extreme northwestern Louisiana. Due to its limited range, it is designated as a vulnerable species.

Helenium drummondii is a species of perennial plant in the Sunflower Family, commonly known as fringed sneezeweed. It is native to the south- central United States, in eastern Texas, Arkansas, and Louisiana. Helenium drummondii is a perennial herb up to 60 cm (2 feet) tall. Leaves are long, thin, and grass-like. One plant can usually produce only 1-3 flower heads. The head is spherical or hemispherical, with sometimes as many as 1000 yellow disc florets, plus 13-30 yellow ray florets. The species grows in bogs, swamps, and other wet places.

Boltonia apalachicolensis, common name Apalachicola doll's-daisy, is a North American species of plants in the family Asteraceae. It is found in the "panhandle" region of northwestern Florida, and has been found in south Louisiana, and Mississippi in the United States. Boltonia apalachicolensis is a plant up to 180 cm (72 inches) tall. It has many daisy-like flower heads with white or lilac ray florets and yellow disc florets. The counties in Florida that have Boltonia apalachicolensis are Franklin, Gulf, Liberty, and Washington. The plant is imperiled in Florida, and critically imperiled in

Sarracenia alata, also known as yellow trumpets, pale pitcher plant or pale trumpet, is a carnivorous plant in the genus Sarracenia. Specifically, S. alata is an endemic species to North America; it is native to the southeastern regions of the United States, including parts of the Gulf Coast states.

Lupinus texensis, the Texas bluebonnet or Texas lupine is a species of lupine found in Texas, Louisiana, Arkansas and the Mexican states of Coahuila, Nuevo León, and Tamaulipas. With other related species of lupines also called bluebonnets, it is the state flower of Texas. It is an annual which begins its life as a small, gravel-like seed. The seed has a hard seed coat that must be penetrated by wind, rain, and weather over the course of a few months (but sometimes several years). In the fall, the bluebonnets emerge as small seedlings with two cotyledons, and later a rosette of leaves that

Eurytaenia is a genus of flowering plants belonging to the family Apiaceae. Its native range is Oklahoma to Texas. Species: Eurytaenia hinckleyi Mathias & Constance Eurytaenia texana Torr. & A.Gray

Fraxinus berlandieriana, the Mexican ash, is a tree native to eastern and northeastern Mexico and to the south-central United States. It has been reported from Tamaulipas, Veracruz, Texas, New Mexico, Oklahoma, Louisiana, and Mississippi. Like other species in the section Melioides, Fraxinus berlandieriana is dioecious, with male and female flowers produced on separate individuals.

Sagittaria papillosa, the nipplebract arrowhead, is a perennial plant species growing up to 120 centimetres (47 inches) tall. Petioles are triangular in cross-section, the leaf blade very narrowly elliptical to ovate, not lobed. The species is distinguished from others in the genus by having bumps (papillae) resembling nipples on the flower bracts. It is native to the south-central United States (Texas, Oklahoma, Louisiana, Arkansas and Mississippi). It grows in wet places such as marshes and the banks of lakes and slow-moving streams.

Physalis angustifolia, the coastal groundcherry, is a species of flowering plant in the family Solanaceae. It is native to the Gulf Coast shoreline of the Southeastern United States, where it is found on maritime dunes and sands.