Plants named in 1798

Quinoa (Chenopodium quinoa; , from Quechua kinwa or kinuwa) is a flowering plant in the amaranth family. It is an herbaceous annual plant grown as a crop primarily for its edible seeds; the seeds are high in protein, dietary fiber, B vitamins and dietary minerals especially potassium and magnesium in amounts greater than in many grains. Quinoa is not a grass but rather a pseudocereal botanically related to spinach and amaranth (Amaranthus spp.), and originated in the Andean region of northwestern South America. It was first used to feed livestock 5,200–7,000 years ago, and for human

Cytisus is a genus of flowering plants in the family Fabaceae, native to open sites (typically scrub and heathland) in Europe, western Asia and North Africa. It belongs to the subfamily Faboideae, and is one of several genera in the tribe Genisteae which are commonly called brooms. They are shrubs producing masses of brightly coloured, pea-like flowers, often highly fragrant. Members of the segregate genera Calicotome, Chamaecytisus, and Lembotropis are sometimes included in Cytisus.

Lagerstroemia speciosa (giant crepe-myrtle, queen's crepe-myrtle, banabá plant, or pride of India, or "queen's flower" or "jarul") is a species of Lagerstroemia native to tropical South Asia, Southeast Asia, and Melanesia. It is a deciduous tree with bright pink to light purple flowers. The name "queen's Flower" is derived from the specific epithet 'reginae' or 'flosreginae', which means "imperial or flower of the queen". The tree bears beautiful attractive flowers in profusion in purple, lilac or pinkish-violet colours, and lasts for many months. Its timber is next only to teak in its

Galinsoga quadriradiata is a species of flowering plant in the family Asteraceae which is known by several common names, including shaggy soldier, Peruvian daisy, hairy galinsoga. Its native home is apparently central Mexico, although it has become naturalized in many other places (North and South America, Europe, Japan, Philippines, the northern India, Nepal, etc.).

Xanthorrhoea is a genus of about 30 species of succulent flowering plants in the family Asphodelaceae. They are endemic to Australia. Common names for the plants include grasstree, grass gum-tree (for resin-yielding species), kangaroo tail, balga (Western Australia), yakka (South Australia), yamina (Tasmania, from the palawa kani language), and black boy (or "blackboy"). The most common species is Xanthorrhoea australis, and some of these names are applied specifically to this species.

Juniperus excelsa, commonly called the Greek juniper, is a juniper found throughout the eastern Mediterranean, from northeastern Greece and southern Bulgaria across Turkey to Syria and Lebanon, Jordan, the Caucasus mountains, and the southern coast of Crimea. A subspecies, J. excelsa subsp. polycarpos, known as the Persian juniper, occurs in the Alborz and other mountains of Iran east to northwestern Pakistan, and an isolated population in the Jebal Akhdar mountains of Oman; some botanists treat this as a distinct species, Juniperus polycarpos.

Drosera intermedia, commonly known as the oblong-leaved sundew, spoonleaf sundew, or spatulate leaved sundew, is an insectivorous plant species belonging to the sundew genus. It is a temperate or tropical species native to Europe, southeastern Canada, the eastern half of the United States, Cuba, Hispaniola, and northern South America.

Ulmus parvifolia, commonly known as the Chinese elm or lacebark elm, is a species native to eastern Asia, including China, India, Japan, Korea, Vietnam, Siberia, and Kazakhstan. It has been described as "one of the most splendid elms, having the poise of a graceful Nothofagus".

Oenanthe aquatica, fine-leaved water-dropwort, is an aquatic flowering plant in the carrot family. It is widely distributed from the Atlantic coast of Europe to central Asia.

Crassula arborescens—the silver jade plant, silver dollar (jade) plant, beestebul, Chinese jade, cookie plant, money plant, or money tree, that is endemic to Western Cape, South Africa, is a species of succulent plant in the family Crassulaceae.

Bruguiera gymnorhiza, the large-leafed orange mangrove or oriental mangrove, is a mangrove tree that grows usually to 7–20 metres (23–66 ft) high, but sometimes up to 35m, that belongs to the family Rhizophoraceae. It is found on the seaward side of mangrove swamps, often in the company of Rhizophora. It grows from the Western Pacific across Indian Ocean coasts to Cape Province, South Africa.

Afzelia is a genus of plants in family Fabaceae. The thirteen species all are trees, native to tropical Africa or Asia. The genus name of Afzelia is in honour of Adam Afzelius (1750–1837), a Swedish botanist and an apostle of Carl Linnaeus.

Ziziphus spina-christi, known as the Christ's thorn jujube, is a thorny and evergreen tree or plant.

Ardisia elliptica is an evergreen tree, also known as the shoebutton ardisia, duck's eye and coralberry, native to the west coast of India, Sri Lanka, Indochina, Malaysia, Indonesia and New Guinea. It is a prolific reproducer which has made it a successful invasive species in other locations in the tropics where it has been introduced as a garden ornamental.

Utricularia intermedia, the flatleaf bladderwort or intermediate bladderwort is a small, perennial carnivorous plant that belongs to the genus Utricularia. It is usually found affixed to the substrate but it can also survive suspended in a body of water. U. intermedia is a circumboreal species and is found in North America, Asia, and Europe.

Orchis italica, the naked man orchid or the Italian orchid, is a species of orchid native to the Mediterranean Basin. It gets its common name from the lobed lip (labellum) of each flower which resembles the general shape of a naked man wearing a hat. In Italy, it is believed that the consumption of the plant is conducive to virility. It prefers partial shade and low nutrient soil, and flowers in April. Orchis italica grows up to 50 centimetres (20 in) in height, with bright pink, densely clustered flowers.

Rosa agrestis, the small-leaved sweet briar, field briar or fieldbriar, is a species of wild rose native to Europe, found mostly in southern Europe and occasionally as far as the Caucasus. Sources differ on whether it can be found in northern Africa and Anatolia. A dog rose, it is in the subgenus Rosa, section Caninae, and subsection Rubigineae. It is a close relative of, and very similar to the sweet briar, Rosa rubiginosa, but with smaller leaves, white to blush petals, and very little odor from either the flowers or the leaves. Although it may be cultivated, most gardeners prefer the sweet

Polypogon monspeliensis, commonly known as annual beard-grass or annual rabbitsfoot grass, is a species of grass. It is native to the Old World, but it can be found today throughout the world as an introduced species and sometimes a noxious weed. It is an annual grass growing to heights between 5 centimeters and one meter. The soft, fluffy inflorescence is a dense, greenish, plumelike panicle, sometimes divided into lobes. The spikelets have long, thin, whitish awns, which give the inflorescence its texture.

Phytelephas is a genus containing six known species of dioecious palms (family Arecaceae), occurring from southern Panama along the Andes to Ecuador, Bolivia, Colombia, northwestern Brazil, and Peru. They are commonly known as ivory palms, ivory-nut palms or tagua palms; the scientific name Phytelephas means "plant ivory" or more literally, "plant elephant". This and the first two of the common names refer to the very hard white endosperm of their seeds (tagua nuts or jarina seeds), which resembles elephant ivory.

Sphagnum magellanicum, commonly called Magellanic bogmoss, Magellan's sphagnum, Magellan's peatmoss or midway peat moss, is a widespread species of moss found in wet boreal forest in the far south and southwest of South America and in northern North America and Eurasia.

Diuris, commonly known as donkey orchids, bee orchids, nanny goat orchids or pansy orchids, is a genus of more than sixty species of flowering plants in the orchid family, Orchidaceae and is endemic to Australia, apart from one species endemic to Timor. The name "Diuris" refers to the hanging sepals but the common name "donkey orchid", derives from the ear-like petals common to all species. Many have mainly yellow flowers with darker markings and are thought to mimic nectar-producing flowers which open at the same time.

Claytonia perfoliata, commonly known as miner's lettuce or winter purslane, is a flowering plant in the family Montiaceae. It is an edible, fleshy, herbaceous, annual plant native to the western mountain and coastal regions of North America.

Celastrus paniculatus is a woody liana commonly known as black oil plant, climbing staff tree, and intellect tree (Sanskrit: jyotishmati ज्योतीष्मती, Hindi: mal-kangni माल-कांगनी, Chinese: deng you teng 灯油藤). This climbing shrub grows throughout India at elevations up to 1,800 m (5,900 ft). C. paniculatus is a deciduous vine with stems up to 10 cm (3.9 in) in diameter and 6 m (20 ft) long with rough, pale brown exfoliating bark covered densely with small, elongated lenticles. The leaves are simple, broad, and oval, obovate or elliptic in shape, with toothed margins.

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Polypogon is a nearly cosmopolitan genus of plants in the grass family, commonly known beard grass or rabbitsfoot grass.

Persoonia, commonly known as geebungs or snottygobbles, is a genus of about one hundred species of flowering plants in the family Proteaceae. Plants in the genus Persoonia are shrubs or small trees usually with smooth bark, simple leaves and usually yellow flowers arranged along a raceme, each flower with a leaf or scale leaf at the base. The fruit is a drupe.

Orobanche elatior the knapweed broomrape is a species of flowering plant belonging to the family Orobanchaceae. It is a parasitic plant that lives on knapweed. Its native range is Europe to China and Iran.

Linum grandiflorum is a species of flax known by several common names, including flowering flax, red flax, scarlet flax, and crimson flax. It is native to Algeria and Tunisia, but it is known elsewhere in Northern Africa, Southern Europe and in several locations in North America as an introduced species. It is an annual herb producing an erect, branching stem lined with waxy, lance-shaped leaves 1 to 2 centimeters long. The inflorescence bears flowers on pedicels several centimeters long. The flower has 5 red petals each up to 3 centimeters long and stamens tipped with anthers bearing light

Boronia is a genus of about 160 species of flowering plants in the citrus family Rutaceae. Most are endemic to Australia with a few species in New Caledonia, which were previously placed in the genus Boronella. They occur in all Australian states but the genus is under review and a number of species are yet to be described or have the description published. Boronias are similar to familiar plants in the genera Zieria, Eriostemon and Correa but can be distinguished from them by the number of petals or stamens. Some species have a distinctive fragrance and are popular garden plants.

Oxalis articulata, known as pink-sorrel, pink wood sorrel, windowbox wood-sorrel, chari amilo (Nepal), sourgrass, netho (khatta) saag (India), is a perennial species of flowering plant in the genus Oxalis native to Northern Argentina, Southern Brazil and Uruguay. It has been introduced in Europe in gardens and is now naturalized in these areas. The plant is susceptible to rust (disease due to the fungus Puccinia oxalidis).