Plants named in 1851

Nothofagus, also known as the southern beeches, is a genus of 43 species of trees and shrubs native to the Southern Hemisphere, found across southern South America (Chile, Argentina) and eastern and southeast Australia, New Zealand, New Guinea, and New Caledonia. The species are ecological dominants in many temperate forests in these regions. Some species are reportedly naturalised in Germany and Great Britain. The genus has a rich fossil record of leaves, cupules, and pollen, with fossils extending into the late Cretaceous period and occurring in Australia, New Zealand, Antarctica, and South

Haloxylon is a genus of shrubs or small trees, belonging to the plant family Amaranthaceae. Haloxylon and its species are known by the common name saxaul. "Saksaul" is a common Turkic word that entered Russian through Kazakh.

The Clethraceae are a small family of flowering plants in the order Ericales, composed of two genera, Clethra and Purdiaea, with approximately 75 species. They are native to warm temperate to tropical regions of Asia and the Americas, with one species also on Madeira. In the past, most botanists included only Clethra in the family, but recent research has shown Purdiaea, previously placed in the closely related family Cyrillaceae, is more closely allied to Clethra.

Sabiaceae is a family of flowering plants that were placed in the order Proteales according to the APG IV system. It comprises three genera, Meliosma, Ophiocaryon and Sabia, with 66 known species, native to tropical to warm temperate regions of southern Asia and the Americas. The family has also been called Meliosmaceae Endl., 1841, nom. rej.

The Icacinaceae, also called the white pear family, are a family of flowering plants, consisting of trees, shrubs, and lianas, primarily of the tropics. The family was traditionally circumscribed quite broadly, with around 55 genera totalling over 400 species. In 2001, though, this circumscription was found to be polyphyletic, and the family was split into four families in three different orders: Icacinaceae sensu stricto (then unplaced at order rank), Pennantiaceae (Apiales), Stemonuraceae (Aquifoliales) and Cardiopteridaceae (also Aquifoliales). Other genera have later been moved to

Haloxylon ammodendron, variously called the saxaul (Russian: саксау́л, romanized: saksaúl), black saxaul, also spelled sacsaoul or saksaul is a plant belonging to the family Amaranthaceae. "Saksaul" is a common Turkic word that entered Russian through Kazakh.

Castanea mollissima, also known as the Chinese chestnut, is an Asian species of chestnut tree in the family Fagaceae.

Crocosmia, also known as montbretia, is a small genus of flowering plants in the iris family, Iridaceae. It is native to the grasslands of southern and eastern Africa, ranging from South Africa to Sudan. One species is endemic to Madagascar.

Quercus variabilis, the Chinese cork oak, is a species of oak in the section Quercus sect. Cerris, native to a wide area of eastern Asia in southern, central, and eastern China, Taiwan, Japan, and Korea.

Gymnocarpium dryopteris, the western oakfern, common oak fern, oak fern, or northern oak fern, is a deciduous fern of the family Cystopteridaceae. It is widespread across much of North America and Eurasia. It has been found in Canada, the United States, Greenland, China, Japan, Korea, Russia, and most of Europe. It is a seedless, vascular plant (with xylem and phloem) that reproduces via spores (not seeds or flowers) and have a life cycle with alternating, free-living sporophyte and gametophyte phases.

The Caribbean pine (Pinus caribaea) is a hard pine species native to Central America, southeastern Mexico, and the northern West Indies (in Cuba, the Bahamas, and the Turks and Caicos Islands). It belongs to subsection Australes in subgenus Pinus. It inhabits tropical and subtropical coniferous forests such as Bahamian pineyards, in both lowland savannas and montane forests.

Eremopyrum is a genus Eurasian and North African plants in the grass family. One species, Eremopyrum triticeum has become widely established as a weed in parts of North America. All the species are annuals with a dense, 2-sided, spikelike inflorescence having 1 spikelet per node. Species Eremopyrum bonaepartis (Spreng.) Nevski - Algeria, Morocco, Middle East, Arabian Peninsula, Central Asia, Iran, Pakistan, Xinjiang Eremopyrum distans (K.Koch) Nevski - European Russia, Caucasus, Middle East, Arabian Peninsula, Central Asia, Iran, Pakistan, Xinjiang, Mongolia Eremopyrum orientale (L.) Jaub. &

Saxegothaea is a genus comprising a single species, Saxegothaea conspicua. It is a conifer in the podocarp family Podocarpaceae, native to southern South America. It grows in Chile and Argentina from 35° to 46° South latitude; in its northernmost natural distribution it grows between 800 and 1000 (2600–3300 ft) m above sea level and in the south it lives at sea level. The species is most often known by its genus name, or sometimes as female maniu (a translation of its name in Spanish) and Prince Albert's yew; in South America it is known as mañío hembra or maniú hembra. The genus name of

Quercus myrsinifolia is an Asian species of tree in the beech family Fagaceae. It has several common names, including bamboo-leaf oak, Chinese evergreen oak, and Chinese ring-cupped oak. Its Chinese name is 小叶青冈; pinyin: xiǎo yè qīng gāng, which means little leaf ring-cupped oak (literally translated as little leaf green ridge tree), in Japan it is called white oak (白樫, shirakashi; not to be confused with Quercus alba) and in Korea it is known as gasinamu (가시나무). It is native to east central and southeast China, Japan, Korea, Laos, northern Thailand, and Vietnam. It is placed in subgenus

Trachelospermum jasminoides is a species of flowering plant in the family Apocynaceae, native to eastern and southeastern Asia (Japan, Korea, southern China and Vietnam). Common names include Confederate jasmine, star jasmine, Confederate jessamine, and Chinese star jessamine. This plant, and the variegated cultivar 'Variegatum', have gained the Royal Horticultural Society's Award of Garden Merit.

Quercus aliena, the galcham oak or oriental white oak, is a species of oak in the family Fagaceae, in the white oak section Quercus.

Nepenthes villosa , or the villose pitcher-plant, is a tropical pitcher plant endemic to Mount Kinabalu and neighbouring Mount Tambuyukon in northeastern Borneo. It grows at higher elevations than any other Bornean Nepenthes species, occurring at elevations of over 3,200 m (10,500 ft). Nepenthes villosa is characterised by its highly developed and intricate peristome, which distinguishes it from the closely related N. edwardsiana and N. macrophylla. The specific epithet villosa is Latin for "hairy" and refers to the dense indumentum of this species.

Gymnocarpium robertianum, the limestone fern or scented oakfern, is a fern of the family Cystopteridaceae.

Gymnocarpium is a small genus of ferns, called oak ferns. It was once placed with various other groups, including the dryopteroid ferns and the athyrioid ferns. Cladistic analysis has demonstrated that Gymnocarpium and Cystopteris form a natural but relatively primitive clade that is basal to the asplenioid, thelypterioid, and athyrioid ferns comprehensively. Gymnocarpium sori are small, round and naked. These ferns generally have a slender, creeping rhizome under the surface of the ground, and fairly thin-textured fronds.

Fagus crenata, buna (Japanese: ブナ), known as Siebold's beech, or Japanese beech, is a species of deciduous tree in the family Fagaceae. It is a tall dense hardwood that is only native to Japan. The first written record of this tree in the Western world was in 1830 and it was scientifically described in 1851. It is a high canopy tree and is the dominant tree in most of its range; often colocated with Quercus crispula (Japanese oak) and Acer mono (Painted maple). Nuts, seeds, oil, and young leaves can be eaten but care must be exercised due to toxins. It is also used for firewood, furniture,

Brunnera is a genus of flowering plants in the family Boraginaceae. They are rhizomatous perennials, native to the woodlands of Eastern Europe and North West Asia. They have hairy leaves and sprays of blue flowers in spring. Numerous cultivars are available, which are valued as groundcover in dappled shade. Some possess variegated foliage. The best known species is B. macrophylla, known as Siberian bugloss. The genus name honors the Swiss botanist Samuel Brunner. The common name "bugloss", meaning ox tongue, originates from Greek and probably refers to the texture and shape of the leaves.

Trachelospermum , is a genus of evergreen woody vines in the dogbane family Apocynaceae, first described as a genus in 1851. All species are native to southern and eastern Asia. They have long stems climbing to 12 m or more high in trees. The leaves are opposite, simple broad lanceolate to ovate, 2–8 cm long and 0.5–4 cm broad. The flowers are salverform (like those of Phlox), simple, 2.5–7 cm broad, with five white, pale yellow or purple petals joined at the base to form a tube. The generic name Trachelospermum comes from the Greek, literally meaning "neck seed", and referring to the seed

Cyrtosperma is a genus of flowering plants in the family Araceae. The genus went through considerable taxonomic changes in the 1980s, and as a result is now considered to be native only to Southeast Asia and some Pacific islands. Previously, the genus was thought to be widespread from Asia to Africa and South America, but the African and South American species were subsequently moved into separate genera. Cyrtosperma is now known to be most prominent in New Guinea. The genus Cyrtosperma is unique in this regard because it is the only known big genus in Araceae that is known to be found east

Carpinus japonica, the Japanese hornbeam, is a hornbeam endemic to Japan but cultivated elsewhere as an ornamental. It is a deciduous tree growing to 12–15 metres (39–49 ft) tall with leaves that are longer and darker than the European hornbeam (Carpinus betulus). The leaves are dark, glossy and slender, with 20-24 pairs of parallel sunken veins; every third tooth is whisker-tipped. The prominent catkins are green turning to brown. This tree has gained the Royal Horticultural Society's Award of Garden Merit.

Carpinus cordata is a species of flowering plant belonging to the family Betulaceae. It is native to Primorye (Russia), China, Korea, and Japan.

Syngonium podophyllum is a species of aroid that is a popular houseplant. Common names include: arrowhead plant, arrowhead vine, arrowhead philodendron, goosefoot, nephthytis, African evergreen, and American evergreen. The species is native to a wide region of Latin America from Mexico through Bolivia, and naturalized in the West Indies, Florida, Texas, Hawaii, and other places.

Parmentiera cereifera, the candle tree, is a species of tree in the family Bignoniaceae. It is endemic to Panama, but it is also a commonly cultivated specimen in botanical gardens. This tree grows up to 6 m tall. The leaves are arranged oppositely, each made up of three leaflets. They are borne on winged petioles up to 5 cm long. The flower is solitary or borne in a cluster of up to four. The five-lobed corolla is greenish white. The fruit is a taper-shaped berry up to 60 cm long. The record is 120 cm long while only 2.5 cm wide. It is green, ripening yellow, and waxy in texture. The fleshy

Encephalartos ferox, a member of the family Zamiaceae, is a small cycad with 35 cm wide subterranean trunk. It gets its name from the Latin word ferocious, likely from the spine-tipped lobes on the leaves of the plant. It is found naturally on the south-eastern coast of Africa where it has been used by local people for its starch content. It is considered to be one of the most popular cultivated cycads.

Dendrocnide is a genus of approximately 40 species of plants in the nettle family Urticaceae. They have a wide distribution across North East India, Southeast Asia, Australia and the Pacific Islands. In Australia they are commonly known as stinging trees.

Carex buekii, the banat sedge, is a species of flowering plant in the genus Carex, native to central, southeastern and eastern Europe, the Caucasus region, Anatolia, and the northern Levant. It forms large stands in the floodplains of central European rivers.