Plants named in 1809

Oleaceae, also known as the olive family or sometimes the lilac family, is a taxonomic family of flowering shrubs, trees, and a few lianas in the order Lamiales. It presently comprises 28 genera, one of which is recently extinct. The extant genera include Cartrema, which was resurrected in 2012. The number of species in the Oleaceae is variously estimated in a wide range around 700. The flowers are often numerous and highly odoriferous. The family has a subcosmopolitan distribution, ranging from the subarctic to the southernmost parts of Africa, Australia, and South America. Notable members

Nuphar lutea, the yellow water-lily, is an aquatic plant of the family Nymphaeaceae, native to northern temperate and some subtropical regions of Europe, northwest Africa, and western Asia. This species was used as a food source and in medicinal practices from prehistoric times with potential research and medical applications going forward.

The Polygalaceae or the milkwort family are made up of flowering plants in the order Fabales. They have a near-cosmopolitan range, with about 27 genera and ca. 900 known species of herbs, shrubs and trees. Over half of the species are in one genus, Polygala, the milkworts. The family was first described in 1809 by Johann Hoffmansegg and Johann Link. In 1896, Robert Chodat split it into three tribes. A fourth tribe was split off from the tribe Polygaleae in 1992. Under the Cronquist classification system, Polygalaceae were treated in a separate order of their own, Polygalales. Currently,

Nuphar is a genus of aquatic plants in the family Nymphaeaceae, with a temperate to subarctic Northern Hemisphere distribution. Common names include water-lily (Eurasian species; shared with many other genera in the same family), pond-lily, alligator-bonnet or bonnet lily, and spatterdock (North American species).

Armeria maritima, the thrift, sea thrift or sea pink, is a species of flowering plant in the family Plumbaginaceae. It is a compact evergreen perennial which grows in low clumps and sends up long stems that support globes of bright pink flowers. In some cases purple, white or red flowers also occur. It is a popular garden flower and has been distributed worldwide as a garden and cut flower. It does well in gardens designed as xeriscapes or rock gardens. The Latin specific epithet maritima means pertaining to the sea or coastal.

Cladium mariscus is a species of flowering plant in the sedge family known by the common names swamp sawgrass, great fen-sedge, saw-sedge or sawtooth sedge. Previously it was known as elk sedge. It is native of temperate Europe and Asia where it grows in base-rich boggy areas and lakesides. It can be up to 2.5 metres (8 ft 2 in) tall, and has leaves with hard serrated edges. In the past, it was an important material to build thatched roofs; harvesting it was an arduous task due to its sharp edges that can cause deep lacerations.

The Monimiaceae is a family of flowering plants in the magnoliid order Laurales. It is closely related to the families Hernandiaceae and Lauraceae. It consists of shrubs, small trees, and a few lianas of the tropics and subtropics, mostly in the southern hemisphere. The largest center of diversity is New Guinea, with about 75 species. Lesser centres of diversity are Madagascar, Australia, and the neotropics. Africa has one species, Xymalos monospora, as does Southern Chile (Peumus boldus). Several species are distributed through Malesia and the southwest Pacific. The Monimiaceae are

Gypsophila vaccaria is a species of flowering plant in the family Caryophyllaceae. It is native from Portugal and Morocco to the Himalayas, and has been introduced into temperate areas worldwide. Among its many synonyms is Vaccaria hispanica, which was the only species placed in the genus Vaccaria. It is known by several common names including cowherb, cowcockle, cow basil, cow soapwort, and prairie carnation. It is an annual herb with blue-gray, waxy herbage and pale pink flowers. The seeds of the species are used in Chinese medicine.

Grevillea, commonly known as spider flowers, is a genus of about 360 species of evergreen flowering plants in the family Proteaceae. Plants in the genus Grevillea are shrubs, rarely trees, with the leaves arranged alternately along the branches, the flowers zygomorphic, arranged in racemes at the ends of branchlets, and the fruit a follicle that splits down one side only, releasing one or two seeds.

Haworthia is a large genus of small succulent plants endemic to Southern Africa (Mozambique, Namibia, Lesotho, Eswatini and South Africa). Like aloes and gasteria they are members of the subfamily Asphodeloideae and they generally resemble miniature aloes, except in their flowers, which are distinctive in appearance. They are popular garden and container plants. These plants were described by Henri Auguste Duval (1777-1814) in 1809. The genus name is derived from Adrian Hardy Haworth’s (1767-1833) name, a botanist and avid succulent collector.

Gasteria is a genus of succulent plants, native to South Africa and the far south-west corner of Namibia.

Gagea lutea, known as the yellow star-of-Bethlehem, is a Eurasian flowering plant species in the family Liliaceae. It is widespread in central Europe with scattered populations in Great Britain, Spain, and Norway to Siberia and Japan. Gagea lutea is a bulb-forming herbaceous perennial with lanceolate leaves and green-tinged yellow flowers with 6 tepals. It is a predominantly lowland species that inhabits moist, base-rich, shady habitats including; broad-leaf woodlands, hedgerows, limestone pavements, pastures, and riverbanks. It has been used as an indicator of ancient woodland in East

Epipactis atrorubens, the dark-red helleborine or royal helleborine, is an herbaceous plant in the orchid family, Orchidaceae. As with many other species of orchids, the species is legally protected in some countries. Plantlife designated the dark-red helleborine as the county flower for Banffshire, Scotland.

Quercus canariensis, the Algerian oak, Mirbeck's oak or zean oak, is an oak native to southern Portugal, Spain, Tunisia, Algeria and Morocco. Despite the scientific name, it does not occur naturally today in the Canary Islands. It is placed in section Quercus.

Juncus gerardii, commonly known as blackgrass, black needle rush or saltmarsh rush, is a perennial flowering plant in the rush family Juncaceae.

Armeria is a genus of flowering plants. These plants are sometimes known as lady's cushion, thrift, or sea pink (the latter because as they are often found on coastlines). The genus counts over a hundred species, mostly native to the Mediterranean, although Armeria maritima is an exception, being distributed along the coasts of the Northern Hemisphere, including Ireland, parts of the United Kingdom such as Cornwall, and the Pembrokeshire Coast National Park in Wales. Some are popular with gardeners as rockery plants. During the Second World War, the UK thruppenny bit coin (3 old pence), which

Juncus balticus is a species of rush known by the common name Baltic rush. It is a perennial flowering plant in the family Juncaceae. It can reach a height of about 75 centimetres (29+1⁄2 inches). It is native to north-western Europe from Spain to northern European Russia, most of North America except the south-eastern United States, parts of Mexico and Central America, and western and southern South America from Colombia to Argentina. It is available from specialist nurseries for landscaping and soil stabilization purposes.[1]

Caulerpa is a genus of seaweeds in the family Caulerpaceae (among the green algae). They are unusual because they consist of only one cell with many nuclei, also known as coenocytic or siphonous algae, making them among the biggest single cells in the world. Referring to the crawling habit of its thallus, the name means 'stem (that) creeps', from the Ancient Greek kaulos (καυλός, 'stalk') and herpo (ἕρπω, 'to creep').

Ullucus is a genus of flowering plants in the family Basellaceae, with one species, Ullucus tuberosus, a plant grown primarily as a root vegetable, secondarily as a leaf vegetable. The name ulluco is derived from the Quechua word ulluku, but depending on the region, it has many different names. These include illaco (in Aymara), melloco (in Ecuador), chungua or ruba (in Colombia), olluco or papa lisa (in Bolivia and Peru), or ulluma (in Argentina). Ulluco is one of the most widely grown and economically important root crops in the Andean region of South America, second only to the potato. The

Orostachys is a genus of the succulent family Crassulaceae (stonecrop family) that contains about 15 species. It is a biennial herb growing in China, Japan, Kazakhstan, Korea, Mongolia, Russia. Eight species occur in China.

Luzula pilosa is a species of flowering plant in the rush family Juncaceae with the common name hairy wood-rush. The plant is native to northern Europe and western Asia.

Euphrasia stricta, the drug eyebright, is an annual forb in the genus Euphrasia. It has been introduced in northeastern North America, where it is found in New England (except Connecticut), New York, Pennsylvania, Nova Scotia, New Brunswick, Prince Edward Island, Ontario, Quebec, the upper peninsula of Michigan, northern Wisconsin, Minnesota and Illinois. It is also found in Central Europe and Pyrenees The preferred growing location is on moist, calcareous sands, such as those on some moors and dunes. The plant is a hemiparasite and can steal water and salts from grasses.

Viola alba, commonly known as white violet, is a species of violet in the family Violaceae.

Rumex confertus (Armenian dock) is a flowering plant species in the family Polygonaceae. It grows quickly, reproduces from rhizomes and seed, and produces large quantities of viable seed. Its seed is adapted for wind and water dispersal and exhibits a high rate of germination.

Galeopsis pubescens, also known as the hairy and downy hempnettle, is a herbaceous annual plant species in the family Lamiaceae, that can be found growing in various European countries.

Fumaria vaillantii, or earthsmoke, is a species of perennial herb in the family Papaveraceae. They have a self-supporting growth form and simple, broad leaves. Individuals can grow to 28 cm. Fumaria vaillantii originates from Europe.

Corymborkis, commonly known as cinnamon orchids, or 管花兰属 (guan hua lan shu) is a genus of eight species of orchids in the family Orchidaceae. They are evergreen, terrestrial plants which grow in clumps and have thin roots, leafy stems, pleated leaves and widely-opening flowers with thin, spreading sepals and petals. They are widely distributed in the tropics.

Aesculus glabra, commonly known as Ohio buckeye, Texas buckeye, or fetid buckeye, is a species of tree in the soapberry family (Sapindaceae) native to North America. Its natural range is primarily in the Midwestern and lower Great Plains regions of the United States, extending southeast into the geological Black Belt of Alabama and Mississippi. It is also found locally in the extreme southwest of Ontario, on Walpole Island in Lake St. Clair. It is found in a variety of natural habitats, including streambanks, upland mesic forests, and along the margins of old fields. It is typically found in

Ziziphus mucronata, known as the buffalo thorn, is a species of tree in the family Rhamnaceae, native to southern Africa. It is deciduous and may grow up to 17 metres tall. It can survive in a variety of soil types, occurring in many habitats, mostly open woodlands, often on soils deposited by rivers, and grows frequently on termite mounds. Its Zulu name “umLahlankosi” alludes to its use as a grave marker for tribal chiefs, while the Afrikaans name “Blinkblaar-wag-'n-bietjie” alludes to the shiny light green leaves and the hooked thorns.

Lotus tenuis is a flowering plant of the pea family Fabaceae, native to western and southern Europe and southwest Asia. Some botanists treat it as a subspecies of Lotus corniculatus, as L. corniculatus subsp. tenuifolius. Its tolerance of salt and poor soil make this plant useful for marginal conditions. It has become naturalised in many other locations, including the Pampas of Argentina, and parts of the United States. Common names include narrowleaf trefoil, narrow-leaved bird's-foot-trefoil, slender trefoil, creeping trefoil, or prostrate trefoil.