Alvan Wentworth Chapman

Taxus floridana, the Florida yew, is a species of yew, endemic to a small area of the Apalachicola River. This species has a restricted extent of occurrence of 24km along the Apalachicola River and resides in the mesophytic forests of northern Florida at altitudes of 15–40 m. It is internationally listed as critically endangered, with a declining population. Although this species was previously listed in the Florida endangered species program, it no longer has legal protection under the U.S. or state endangered species programs. However, the bulk of its very limited historically native range

Leitneria floridana (corkwood), the sole species in the genus Leitneria, is a deciduous dioecious shrub or small tree, found only in the southern United States states of Arkansas, Florida, Georgia, Missouri and Texas. It grows at damp habitats, mostly in coastal areas and has extremely light wood with a density less than that of cork. It typically reaches 2–4 m tall, occasionally up to 8 m. The trunk can reach 10 cm in diameter. The leaves are alternate, simple lanceolate, 5–20 cm long and 3–6 cm broad. In the past, it was treated as the only species in the family Leitneriaceae of the order

Croton alabamensis, known as Alabama croton, is a rare species of flowering plant in the spurge family, Euphorbiaceae, that is endemic to Texas and Alabama in the Southeastern United States. It has two varieties whose ranges are separated by more than 1000 km: Croton alabamensis var. alabamensis (Alabama croton) is found in two central Alabama counties, while Croton alabamensis var. texensis (Texabama croton) is found in three counties in Texas. The Alabama croton is a semi-evergreen monoecious shrub that reaches a height of 5–35 dm. It is the northernmost shrubby species of the genus Croton

Astragalus tennesseensis is a species of flowering plant in the legume family known by the common name Tennessee milkvetch. It is native to the United States, where it is known from Illinois, Indiana, Tennessee and Alabama. Most of the occurrences are in Tennessee. This plant produces cream-colored flowers in April and May. The seedlings grow slowly and several years pass before the plants reach reproductive maturity. The species is adapted to drought, remaining metabolically active in habitat that is dry over the summer. This plant has been nearly extirpated from Illinois and Indiana, but it

Euphorbia deltoidea (syn. Chamaesyce deltoidea), also called wedge sandmat, is a species of flowering plant endemic to Florida in the United States. The taxonomy of the plant is difficult, with some authorities dividing it into four subspecies and some into three; also, it is frequently listed as a member of the old genus Chamaesyce. One subspecies, ssp. deltoidea, is a federally listed endangered species called deltoid spurge. It is found only in Miami-Dade County. Another subspecies, ssp. adhaerens, is often included with it under the name deltoidea instead of separately, making it

Cyperus retrorsus, commonly called pine barren flatsedge, is a species of flowering plant in the sedge family (Cyperaceae). It is found primarily in the Southeastern United States, with a range extending north to Martha's Vineyard, Massachusetts and south to Tamaulipas, Mexico. Its natural habitat corresponds to dry sandy soils, open woodlands and thickets. Cyperus retrorsus is a tufted perennial, growing to around 50 cm (20 in) tall. Its fruits mature in the summer. It is similar to the closely related C. echinatus, from which C. retrorsus can be distinguished by its cylindrical

Xyris difformis, the bog yelloweyed grass, is a North American species of flowering plant in the yellow-eyed-grass family. It is native to the eastern and southern United States, eastern and central Canada, and Central America. Xyris difformis is a perennial herb up to 90 cm (3 feet) tall with grass-like leaves up to 50 cm (20 inches) long, and yellow flowers. Varieties Xyris difformis var. curtissii (Malme) Kral - Belize, coastal states of USA from Texas to Virginia Xyris difformis var. difformis - Nova Scotia, Ontario, USA (coastal states from Maine to Texas plus areas as far inland as

Scutellaria montana, with the common names largeflower skullcap, large-flowered skullcap and mountain skullcap, is a perennial forb first described by Alvan Chapman in 1878. This narrowly endemic species is found in the southeastern United States in parts of the Ridge and Valley and Cumberland Plateau Physiographic Provinces. Populations have been documented from four Tennessee counties and nine Georgia counties and is protected under the US Endangered Species act as it is a threatened species. The Latin specific epithet montana refers to mountains or coming from mountains.

Salix floridana, the Florida willow, is a species of willow in the family Salicaceae. It is native to the southeastern United States in northern Florida and southwestern Georgia.

Euphorbia telephioides is a rare species of euphorb known by the common name Telephus spurge. It is endemic to Florida in the United States, where it is known only from three counties in the Panhandle. It is a federally listed threatened species of the United States. This spurge grows in coastal areas in Bay, Gulf, and Franklin Counties in Florida. It is present at about 38 known locations, with some locations newly discovered and some recently extirpated. The habitat is scrub and forest where it often grows alongside slash (Pinus elliottii) and longleaf pine (Pinus palustris) or oaks. Much

Euphorbia garberi (syn. Chamaesyce garberi) is a rare species of flowering plant in the euphorb family known by the common name Garber's spurge. It is endemic to Florida, where there are 17 known occurrences, fourteen of which are located on fourteen separate islands of the Florida Keys. The populations vary in size, with four containing fewer than 20 plants each and one containing over one million. The plant has been reduced to a small portion of its former distribution and remaining populations are threatened by a number of processes. This is a federally listed threatened species of the

Crataegus triflora is an uncommon hawthorn species of the south-eastern United States, of known by the common name three-flowered hawthorn. It is a multi-stemmed shrub 3 to 5 metres (10 to 16 feet) tall. The flowers are quite large for hawthorn flowers, and occur in small clusters (not necessarily exactly three to a cluster). Although rarely cultivated, it can be very attractive if well grown.

Carex baltzellii, Baltzell's sedge, is a species of flowering plant in the family Cyperaceae, native to the US states of Mississippi, Alabama, Florida, and Georgia. A rare species, it is found only on the slopes of forested ravines.

Xyris platylepis, the tall yelloweyed grass, is a North American species of flowering plants in the yellow-eyed-grass family. It grows on the coastal plain of the southeastern and south-central United States from eastern Texas to Virginia. Xyris platylepis is a perennial herb up to 10 cm (4 inches) tall with long, narrow leaves up to 50 cm (20 inches) long. It can be found growing in habitat types such as sandhill seeps, savannahs, and other.

Paronychia rugelii, common names Rugel's nailwort and sand-squares, is a plant native to the US states of Georgia and Florida. It can be found in woodlands and on disturbed sites at elevations below 200 m (667 feet). They are sometimes referred to as sand squares. Paronychia rugelii is an annual herb up to 50 cm (20 inches) tall, nearly the entire above-ground parts with hairs. Leaves are ovate to lanceolate, up to 6 mm (0.24 inches) long. Flowers are reddish-brown and white.

Ilex coriacea, sometimes known as large gallberry or sweet gallberry, is a shrub in the holly family native to coastal areas in the United States from Virginia to Texas. It exists primarily as an understory plant in pine forests, and is sometimes managed by controlled burnings, resprouting from rhizomes. Ilex coriacea is a facultative wetland plant and can be found in sandy, moist to wet soils in bogs, at the edges of ponds and in seepage swamps called baygalls. It is planted as an ornamental and prefers acidic soils. The plant is an important nectar source for beekeepers.

Eupatorium mikanioides, commonly called semaphore thoroughwort, is a herbaceous perennial plant in the family Asteraceae found only in the US state of Florida. Like other members of the genus Eupatorium, it produces large numbers of small white flower heads, each head with 5 disc florets but no ray florets. It grows a half meter to one meter tall. It grows in wet to moist areas, and is salt-tolerant.

Asimina reticulata, the netted pawpaw, is a species of plant in the family Annonaceae. It is endemic to Florida in the United States.

Xyris stricta, the pineland yelloweyed grass, is a North American species of flowering plants in the yellow-eyed-grass family. It grows on the coastal plain of the southern United States from the Carolinas to Texas. Xyris stricta is a perennial herb with a stem up to 100 cm (40 inches) tall with long, narrow leaves up to 60 cm (5 feet) long but generally less than 10 mm (0.4 inches) wide.

Xyris serotina, the acidswamp yelloweyed grass, is a North American species of flowering plants in the yellow-eyed-grass family. It grows on the coastal plain of the southeastern United States from eastern Louisiana to the Carolinas. Xyris serotina is a perennial herb with a stem up to 60 cm (2 feet) tall with long, narrow leaves up to 20 cm (8 inches) long.

Xyris flabelliformis, the savannah yelloweyed grass, is a North American species of flowering plant in the yellow-eyed-grass family. It is native to the coastal plain of the United States from eastern Mississippi to the Carolinas. Xyris flabelliformis is a perennial herb up to 30 cm (12 inches) tall with thread-like leaves up to 10 cm (4 inches) long, and yellow flowers.

Uvularia floridana, the Florida bellwort, is a plant species native to the US states of Florida, Georgia, Alabama, Mississippi, and South Carolina. It grows in rich hardwood forests at elevations less than 100 m. Uvularia floridana is a perennial herb spreading by means of underground rhizomes. It has one pale yellow flower per stem.

Triplasis purpurea, the purple sand-grass, is a species of grass in the family Poaceae native to North America. The specific epithet purpurea is Latin for "purple", referencing the purple spikelets of the grass.

Sporobolus floridanus, commonly referred to as Florida dropseed, is a species of perennial graminoid, which is endemic to the southeastern region of the United States.

Scutellaria floridana, the Florida skullcap, is a rare species of flowering plant. It is endemic to Florida in the United States, where it is known only from the Florida Panhandle. It is threatened by a number of human activities and its small population sizes make it vulnerable. It is a federally listed threatened species. This is a perennial herb growing up to 40 centimeters tall with one or more upright, square-edged stems. The tiny, narrow leaves are linear in shape with rolled edges and are just a few millimeters long. Flowers occur next to the leaves. The corolla has one lower lip and a

Rhynchospora compressa, known by the common name of flatfruit beaksedge, is a member of the sedge family, Cyperaceae. It is a perennial herb, found in wetlands of the southeastern United States, primarily along the northeastern Gulf Coast. R. compressa grows approximately 5 ft (1.5 m) tall, and may be found in moist sands or peats near bogs, in savannas, or in pinelands. Its dark brown spikelets bloom from May through November.

Macbridea alba is a rare species of flowering plant in the mint family known by the common names white birds-in-a-nest and white macbridea. It is endemic to Florida in the United States, where it is found in four counties in the Florida Panhandle. It is threatened by the loss and degradation of its habitat, and it is federally listed as a threatened species of the United States. This plant grows in the counties of Gulf, Liberty, Franklin and Bay in Florida. There are just under 10,000 individuals in total divided amongst several scattered populations. About 40% of the occurrences are within

Leavenworthia stylosa is a species of flowering plant in the family Brassicaceae known by the common names cedar gladecress or long-styled gladecress. It is found only in the Central Basin of Tennessee, where it grows in cedar glades, ditches, and low-lying fields. It is an annual herb growing up to 3 in (7.6 cm) tall. Leavenworthia stylosa typically blooms from March to May. The flowers are about 1 inch wide and are white or yellow in color with a yellow center. The tips of the petals are notched. Yellow varieties are found more commonly north of Nashville, while white varieties are found

Eustachys glauca, the saltmarsh fingergrass, is a species of grass native to the southeastern United States. This perennial grass grows up to 4 feet tall. The dark green, folded leaf blades are 12 to 14 inches long and have rounded tips. The ligule is a tiny fringe of hairs. The seedhead is made up of 15 to 20 long spikes, each up to 5 centimeters long. The brown spikelets are arranged along one side of each spike. The grass grows for a long time during the year and may produce 2 or more crops of seed in a season. This grass grows in coastal habitat, such as marsh land and sloughs. It prefers

Euphorbia discoidalis, commonly known as summer spurge, is a flowering plant. A dicot, it grows across parts of the southern United States. It reaches about 18 inches (460 mm) in height and has white flowers in the late summer and early fall. It is part of the Euphorbiaceae (spurge) family and the genus Euphorbia.