Plants named in 1816

Theaceae, the tea family, is a family of flowering plants comprising shrubs and trees, including the economically important tea plant, and the ornamental camellias. It can be described as having from seven to 40 genera, depending on the source and the method of circumscription used. The family Ternstroemiaceae has been included within Theaceae; however, the APG III system of 2009 places it instead in Pentaphylacaceae. Most but not all species are native to China and East Asia.

Gesneriaceae, the gesneriad family, is a family of flowering plants consisting of about 152 genera and ca. 3,540 species in the tropics and subtropics of the Old World (almost all Didymocarpoideae) and the New World (most Gesnerioideae), with a very small number extending to temperate areas. Many species have colorful and showy flowers and are cultivated as ornamental plants.

Pontederiaceae is a family of flowering plants. The APG IV system of 2016 (unchanged from the APG III system of 2009, the APG II system of 2003 and the APG system of 1998) places the family in the order Commelinales, in the commelinid clade, in the monocots. It is a small family of heterostylous aquatic plants, occurring in tropical and subtropical waters. Charles Darwin was interested in the specialized form of heterostyly found in the family, known as tristyly. Not all of the species are heterostylous. The family contains two genera with around 40 known species. It is best known for the

Elaeocarpaceae is a family of flowering plants. The family contains approximately 615 species of trees and shrubs in 12 genera. The largest genera are Elaeocarpus, with about 350 species, and Sloanea, with about 120. The species of Elaeocarpaceae are mostly tropical and subtropical, with a few temperate-zone species. Most species are evergreen. They are found in Madagascar, Southeast Asia, Australia, New Zealand, West Indies, and South America. Plants in this family have simple leaves, usually arranged alternately, sometimes in opposite pairs or whorled, often clustered at the ends of the

Podostemaceae (riverweed family), a family in the order Malpighiales, comprise about 50 genera and c. 300 species of more or less thalloid aquatic herbs.

Ligularia (leopard plant) is a genus of Old World herbaceous perennial plants in the groundsel tribe within the sunflower family. They have yellow or orange composite flower heads with brown or yellow central disc florets, and are native to damp habitats mostly in central and eastern Asia, with a few species from Europe. There are about 120 to 140 species in the genus, and over half are endemic to China. The name Ligularia, from the Latin for "strap", refers to the shape of the ray florets. Some species and cultivars are cultivated as ornamentals. Ligularia dentata ‘Britt Marie Crawford’

Bactris gasipaes is a species of palm native to the tropical forests of Central and South America. It is well spread in these regions, where it is often cultivated by smallholders in agroforestry systems or more rarely, in monoculture. Common names include peach palm in English, among others used in South American countries. It is a long-lived perennial plant that is productive for 50 to 75 years on average. Its population has an important genetic diversity, leading to numerous fruits, colors, and qualities. The fruits are edible and nutritious but need to be cooked for 30 minutes to five

Anacyclus pyrethrum, the pellitory, Spanish chamomile, Mount Atlas daisy, bertram, or Akarkara, is a species of flowering plant in the daisy family Asteraceae. It is native to Mediterranean Europe and parts of North Africa, but also naturalised in other parts of Europe, India and Pakistan. This herbaceous perennial resembles chamomile species in habitat and appearance. The plants known as pellitory-of-the-wall and spreading pellitory belong to a different family, the nettles (Urticaceae).

Cerastium fontanum, also called mouse-ear chickweed, common mouse-ear, or starweed, is a species of mat-forming perennial or, rarely, annual plant. It is native to Europe but introduced elsewhere. Its identifying characteristics are tear-shaped leaves growing opposite one another in a star pattern, hairy leaves, and small white flowers. Mouse-ear chickweed typically grows to 4"-8" tall and spreads horizontally along the ground via the formation of roots wherever the stem falls over and contacts the ground.

Peperomia pellucida (also known by common names pepper elder, shining bush plant, crab claw herb, and man to man) is an annual, shallow-rooted herb, usually growing to a height of about 15 to 45 cm (6 to 18 inches), it is characterized by succulent stems, shiny, heart-shaped, fleshy leaves and tiny, dot-like seeds attached to several fruiting spikes. It has a mustard-like odor when crushed.

Spondias tuberosa, commonly known as imbu, Portuguese pronunciation: [ũˈbu], [ĩˈbu] Brazil plum, or umbu, is a plant native to northeast Brazil, where it grows in the Caatinga, the chaparral scrub that grows wild across dry lands. The round fruit is light yellow to red, around 2–4 cm in size, and has a leathery shell. The flesh is soft and juicy, with a sweet taste and distinct aroma. The fruit comes from a small tree, seldom higher than 6 m, with an expansive crown that can reach 10 m in diameter. The fruit of the imbu are round and can be of varying size: they can be as small as cherries or

Attalea is a large genus of palms native to Mexico, the Caribbean, Central and South America. This pinnately-leaved, non-spiny genus includes both small palms without an aboveground stem and large trees. The genus has a complicated taxonomic history and has often been divided into four or five genera based on differences in male flowers. Since the genera can only be distinguished on the basis of their male flowers, the existence of intermediate flower types and the existence of hybrids between different genera has been used as an argument for keeping them all in the same genus. This has been

Adenostyles is a genus of flowering plants in the sunflower family Asteraceae, and of the tribe Senecioneae. It was described as a genus in 1816. Adenostyles occur in the temperate climates of the northern hemisphere, mainly in Europe and Asia Minor. Adenostyles includes species that were considered to belong to the genus Cacalia. The term was used in 1883 for a genus of Orchidaceae.

Potamogeton nodosus is a species of aquatic plant known by the common names longleaf pondweed and Loddon pondweed. It is native to Eurasia and the Americas, where it is widespread and can be found in water bodies such as ponds, lakes, ditches, and streams. This is a perennial herb producing a thin, branching stem easily exceeding a meter in maximum length. The submerged leaves are linear to widely lance-shaped and up to 15 by 4 centimetres (5.9 in × 1.6 in) in length and width, respectively, while the floating leaves achieve shorter maximum lengths and are ovate or elliptic. Both floating

Altensteinia is a genus of orchids. It is found in the Andean region of South America. At present (May 2014), eight species are accepted.

Sonneratia alba is a mangrove tree in the family Lythraceae. The specific epithet alba is from the Latin meaning 'white', referring to the flowers.

Juniperus macrocarpa (large-fruited juniper, syn. J. oxycedrus subsp. macrocarpa (Sibth. & Sm.) Ball) is a species of juniper, native across the northern Mediterranean Region from southwestern Spain east to western Turkey and Cyprus, growing on coastal sand dunes from sea level up to 75 metres (246 feet) in altitude. A single, isolated tree is found further west, in a cliff in southern Portugal. It is a spreading shrub 2–5 m (6+1⁄2–16+1⁄2 ft) tall, rarely a small tree up to 14 m (46 ft) tall. The leaves are broad lanceolate, produced in whorls of three, green, 12–20 millimetres (1⁄2–3⁄4 in)

Gagea serotina, synonym Lloydia serotina, is an Arctic–alpine flowering plant of the lily family. It is widespread across the mountainous parts of western North America, from Alaska to New Mexico, and in Europe is found in the Alps, the Carpathians and the mountains of Bulgaria, as well as in Great Britain. It is also native to much of Central Asia, Siberia, China, Nepal, Mongolia, Korea and Japan. It was originally known as mountain spiderwort, but is now known in Great Britain as the Snowdon lily, or in Welsh as lili'r Wyddfa. In North America, it is called the common alplily. It is also

Gagea minima, known as the least gagea, is a Eurasian species of plants in the lily family. Its native range is quite large, as it is found in much of south-central, southeastern, central and northern Europe (Italy, Germany, Scandinavia, and from there eastwards into European Russia), with additional populations in the Caucasus region. Gagea minima is a bulb-forming perennial up to 20 cm tall. Flowers are bright lemon yellow, sometimes green on the underside of the tepals.

Lemna minuta is a species of duckweed known by the common name least duckweed. It is the smallest Lemna species. It is native to parts of the Americas, and naturalized in others; the exact native range is not known. It is found on other continents as a non-native introduction as well. The plant's distribution is ever-expanding; it has been spreading in Europe and it was described from Poland for the first time in 2007. In many areas it is a noxious weed, such as in Belgium. This tiny plant varies in shape depending on growth conditions. In the shade it is a single green translucent oval body

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Restrepia, abbreviated Rstp in horticultural trade, is a small genus of 50 species in the orchid family (Orchidaceae), closely related to Pleurothallis. Named in honor of Don Jose Restrepo, it tends to be more showy than most other Pleurothallids. They are found primarily at higher altitudes in the cool, damp montane forests of the Andes and Venezuela, with some into Central America up to southern Mexico.

Bifora is a cosmopolitan genus of flowering plant in the family Apiaceae, of disjunct distribution, with 3 species, two Eurasian and one American. Bifora radians has a range extending from Spain eastward through south central and Southern Europe to Iran. Bifora testiculata has a wider and more southerly distribution, extending west–east from Spain to Uzbekistan and taking in, to the south, North Africa, the Levant and Saudi Arabia. Bifora americana (Common name: prairie bishop's weed) has a southerly distribution within the United States, being confined to Texas and Arkansas, although it has

Zygnema is a genus of freshwater filamentous thalloid alga comprising about 100 species. A terrestrial species, Z. terrestre, is known from India. Zygnema grows as a free-floating mass of filaments, although young plants may be found anchored to streambeds with a holdfast. The filaments form a yellow-green to bright green colored tangled mat, and are composed of elongate barrel-shaped cells, each with two star-shaped (stellate) chloroplasts arrayed along the axis of the cell.

Purshia (bitterbrush or cliff-rose) is a small genus of 5–8 species of flowering plants in the family Rosaceae which are native to western North America.

Ptilostemon is a genus of thistle in the tribe Cardueae within the family Asteraceae. It includes 15 species native to the Mediterranean Basin and the Caucasus.

Homogyne is a genus of flowering plants in the daisy family, Asteraceae. Species Homogyne alpina - Europe from Britain + Portugal to Ukraine Homogyne ausserdorferi - Austria Homogyne discolor - Italy, Austria, Germany, Croatia, Slovenia, Bosnia-Herzegovina Homogyne montana - Alps Homogyne sylvestris - Italy, Austria, Croatia, Slovenia

Eriochloa is a widespread genus of plants in the grass family, commonly called cupgrass. They are found across much of Africa, Asia, Australia, and the Americas, plus a few places in European Russia. Species Eriochloa acuminata – tapertip cupgrass - Mexico, southern USA (from CA to MD + FL), northern Argentina Eriochloa aristata – bearded cupgrass - Mexico, USA (AZ, CA, MS) Eriochloa australiensis - Australia Eriochloa boliviensis - Bolivia Eriochloa boxiana - Mexico, Central America, Lesser Antilles, Colombia, Venezuela Eriochloa contracta – prairie cupgrass - Mexico, USA (from CA to FL to

Cryptarrhena is a genus of orchids (family Orchidaceae). It consists of 3 known species, native to the New World Tropics.

Monarda citriodora is a species of flowering plant in the mint family, Lamiaceae, that is native to the southern United States and northern Mexico. Common names include lemon beebalm, lemon mint (this may also apply to Eau de Cologne mint) and purple horsemint. When crushed, the leaves emit an odor reminiscent of lemons. This odor is sometimes described as more resembling oregano, especially late in the season. Its purple flowers are highly attractive to butterflies, bees and hummingbirds.