Plants named in 1805

Cynodon dactylon, commonly known as Bermuda grass or as couch grass in Australia and New Zealand, is a grass found worldwide. It is native to Europe, Africa, Australia, and much of Asia namely Nepal's hilly regions and has been introduced to the Americas. Contrary to its common name, Cynodon dactylon is not native to Bermuda but is an abundant invasive species there. In Bermuda, it has been known as crabgrass, also a name for Digitaria sanguinalis. Other names include dhoob, dūrvā grass, ethana grass, dubo, dog grass, dog's tooth grass, Bahama grass, devil's grass, couch grass, Indian doab,

Nymphaeaceae is a family of flowering plants, commonly called water lilies. They live as rhizomatous aquatic herbs in temperate and tropical climates around the world. The family contains five genera with about 70 known species. Water lilies are rooted in soil in bodies of water, with leaves and flowers floating on or rising from the surface. Leaves are oval and heart-shaped in Barclaya. Leaves are round, with a radial notch in Nymphaea and Nuphar, but fully circular in Victoria and Euryale. Water lilies are a well-studied family of plants because their large flowers with multiple

The Amaryllidaceae are a family of herbaceous, mainly perennial and bulbous (rarely rhizomatous) flowering plants in the monocot order Asparagales. The family takes its name from the genus Amaryllis and is commonly known as the amaryllis family. The leaves are usually linear, and the flowers are usually bisexual and symmetrical, arranged in umbels on the stem. The petals and sepals are undifferentiated as tepals, which may be fused at the base into a floral tube. Some also display a corona. Allyl sulfide compounds produce the characteristic odour of the onion subfamily (Allioideae). The

The Crassulaceae (, from Latin crassus, thick), also known as the crassulas, the stonecrops or the orpine family, are a diverse family of flowering plants primarily characterized by succulent leaves and a form of photosynthesis known as crassulacean acid metabolism (CAM), in which plants photosynthesize in the daytime and exchange gases during the cooler temperatures of the night. The blossoms of crassulas generally have five floral parts. Crassulaceae are usually herbaceous, though there are some subshrubs, and relatively few trees or aquatic plants. The Crassulaceae is a medium-sized family

The Verbenaceae ( VUR-bə-NAY-see-ee), the verbena family or vervain family, is a family of mainly tropical flowering plants. It contains trees, shrubs, and herbs notable for heads, spikes, or clusters of small flowers, many of which have an aromatic smell. The family Verbenaceae includes 32 genera and 800 species. Phylogenetic studies have shown that numerous genera traditionally classified in Verbenaceae belong instead in Lamiaceae. The mangrove genus Avicennia, sometimes placed in the Verbenaceae or in its own family, Avicenniaceae, has been placed in the Acanthaceae. Economically important

Lythraceae is a family of flowering plants that includes 28 genera and about 620 species of herbs, shrubs, and trees. The larger genera include Cuphea (275 spp.), Lagerstroemia (56), Nesaea (50), Rotala (45), and Lythrum (35). It also includes the members of the former families of the pomegranate (Punica granatum, formerly in Punicaceae) and of the water caltrop (Trapa natans, formerly in Trapaceae). Lythraceae has a worldwide distribution, with most species in the tropics, but ranging into temperate climate regions as well. The family is named after the type genus, Lythrum, the loosestrifes

Kalanchoe pinnata, commonly known as cathedral bells, air plant, life plant, miracle leaf, and love bush, is a succulent plant native to Madagascar. It is a popular houseplant and has become naturalized in tropical and subtropical areas. The species is distinctive for the profusion of miniature plantlets that form on the margins of its leaves, a trait it has in common with some other members of Bryophyllum (now included in Kalanchoe).

Shorea robusta, the sal tree (Devanagari: साल ; IAST: sāla), shala, sakhua, or sarai, is a species of tree in the family Dipterocarpaceae. The tree is native to India, Bangladesh, Nepal, Tibet and across the Himalayan regions.

Corydalis (from Greek korydalís "crested lark") is a genus of about 540 species of annual and perennial herbaceous plants in the family Papaveraceae, native to the temperate Northern Hemisphere and the high mountains of tropical eastern Africa. They are most diverse in China and the Himalayas, with at least 357 species in China. Corydalis species are the only dicots having only a single cotyledon (seed leaf).

Johnson grass or Johnsongrass, Sorghum halepense, is a plant in the grass family, Poaceae, native to Asia and northern Africa. The plant has been introduced to all continents except Antarctica, and most larger islands and archipelagos. It reproduces by rhizomes and seeds. Johnson grass has been used for forage and to stop erosion, but it is often considered a weed because: Foliage that becomes wilted from frost or hot, dry weather can contain sufficient amounts of hydrogen cyanide to kill cattle and horses if it is eaten in quantity. The foliage can cause 'bloat' in such herbivores from the

Aleurites moluccanus, commonly known as candlenut, Indian walnut or, in Hawaii, kukui, is a tree in the spurge family Euphorbiaceae. It grows to about 30 m (98 ft) tall and produces drupe fruit. First described by Carl Linnaeus in 1753, the species' origin is unclear due to its spread by humans, but it can be found in many tropical rainforests and gallery forests. Various parts of the plant have regional or cultural uses.

Cynodon, from Ancient Greek κύων (kúōn), meaning "dog", and ὀδούς (odoús), meaning "tooth", is a genus of plants in the grass family. It is native to warm temperate to tropical regions of the Old World, as well as being cultivated and naturalized in the New World and on many oceanic islands.

Brugmansia is a genus of seven species of flowering plants in the nightshade family Solanaceae. They are woody trees or shrubs, with pendulous flowers, and have no spines on their fruit. Their large, fragrant flowers give them their common name of angel's trumpets, adjacent to the nickname devil's trumpets of the closely related genus Datura. Brugmansia species are among the most toxic of ornamental plants, containing tropane alkaloids of the type also responsible for the toxicity and deliriant effects of both jimsonweed and the infamous deadly nightshade. All seven species are known only in

Euryale ferox, commonly known as prickly waterlily, makhānā, or Gorgon plant, is a species of water lily found in southern and eastern Asia, and the only extant member of the genus Euryale. The edible seeds, called fox nuts or gorgon nuts, are dried and eaten predominantly in Asia. The plant is cultivated for its seeds in lowland ponds in India, China, and Japan. The Indian state of Bihar produces 90% of the world's fox nuts. The Chinese have cultivated the plant for centuries. In India, more than 96,000 hectares of Bihar were set aside for cultivation of Euryale in 1990–1991. In the northern

Anthriscus (chervils) is a common flowering plant genus of the family Apiaceae, which includes 14 species native to Europe, temperate Asia, northwest Africa, and the tropical African mountains. The genus grows in meadows and verges on slightly wet porous soils. One species, Anthriscus cerefolium is cultivated and used in the kitchen to flavor foods. Anthriscus species are used as food plants by the larvae of some Lepidoptera species including the mouse moth (recorded on cow parsley). The hollow stem is erect and branched, ending in compound umbels of small white or greenish flowers. The

Luzula is a genus of flowering plants in the rush family Juncaceae. The genus has a cosmopolitan distribution, with species occurring throughout the world, especially in temperate regions, the Arctic, and higher elevation areas in the tropics. Plants of the genus are known commonly as wood-rush, wood rush, or woodrush. Possible origins of the genus name include the Italian lucciola ("to shine, sparkle") or the Latin luzulae or luxulae, from lux ("light"), inspired by the way the plants sparkle when wet with dew. Another etymology sometimes given is that it does derive from lucciola but that

Koeleria is a common and widespread genus of plants in the grass family, found on all continents except Antarctica and on various oceanic islands. It includes species known generally as Junegrasses. The genus was named after German botanist Georg Ludwig Koeler (1765–1807). Species Formerly included hundreds of species once included in Koeleria but now considered better suited to other genera including Aeluropus, Agrostis, Colpodium, Dactylis, Erioneuron, Festuca, Graphephorum, Rostraria, Schismus, Sesleria, Trisetaria and Trisetum.

Dipterocarpus is a genus of flowering plants and the type genus of family Dipterocarpaceae. Dipterocarpus is the third-largest and most diverse genus among the Dipterocarpaceae. The species are well known for timber, but less acknowledged for use in traditional herbal medicine. The genus has about 70 species, occurring in South Asia and Southeast Asia, from Sri Lanka and India to the Philippines. It is an important component of dipterocarp forests. Its generic name comes from Greek and means "two-winged fruits". The greatest diversity of Dipterocarpus species occurs on Borneo, with many

Spathodea is a genus in the plant family Bignoniaceae. The single species it contains, Spathodea campanulata, is commonly known as the African tulip tree or the Nandi Flame. The tree grows between 7–25 m (23–82 ft) tall and is native to tropical dry forests of Africa. It has been nominated as among 100 of the "World's Worst" invaders. This tree is planted extensively as an ornamental tree throughout the tropics and is much appreciated for its very showy reddish-orange or crimson (rarely yellow), campanulate flowers. The generic name comes from the Ancient Greek words σπαθη (spathe) and οιδα

Trisetum is a genus of plants in the grass family, widespread in temperate, subarctic, and alpine habitats in much of the world. Oatgrass is a common name for plants in this genus.

Valeriana rubra (synonym Centranthus ruber), the red valerian, spur valerian, kiss-me-quick, fox's brush, devil's beard or Jupiter's beard, is a popular garden plant grown for its ornamental flowers.

Terminalia bellirica, known as bahera, beleric or bastard myrobalan, is a large deciduous tree in the family Combretaceae. It is common on the plains and lower hills in South and Southeast Asia, where it is also grown as an avenue tree. The basionym is Myrobalanus bellirica Gaertn. (Fruct. Sem. Pl. 2: 90, t. 97. 1791). William Roxburgh transferred M. bellirica to Terminalia as "T. bellerica (Gaertn.) Roxb.". This spelling error is now widely used, causing confusion. The correct name is Terminalia bellirica (Gaertn.) Roxb.

Rhynchospora (beak-rush or beak-sedge) is a genus of about 400 species of sedges with a cosmopolitan distribution. The genus includes both annual and perennial species, mostly with erect 3-sided stems and 3-ranked leaves. The achenes bear a beak-like tubercule (hence the name "beak-rush", although the plants are sedges, not rushes) and are sometimes subtended by bristles. Many of the species are similar in vegetative appearance, and mature fruits are needed to make a positive identification. The inflorescences (spikelets) are sometimes subtended by bracts which can be leaf-like or showy,

Quercus pyrenaica, also known as Pyrenean oak, or Spanish oak is a tree native to southwestern Europe and northwestern North Africa. Despite its common name, it is rarely found in the Pyrenees Mountains and is more abundant in northern Portugal and north and northwestern Spain. It is placed in section Quercus. The oak is cultivated as an ornamental tree for gardens and parks.

Luzula campestris, commonly known as field wood-rush or Good Friday grass is a flowering plant in the rush family Juncaceae. It is also one of the plants known as chimney sweeps or sweep's broom because of the brush-like appearance of their flowers. This is a very common plant throughout temperate Europe extending to the Caucasus. This species of Luzula is found on all types of native grasslands, and cultivated areas such as lawns, golf-course greens and fields.

Habenaria, commonly called rein orchids or bog orchids, is a widely distributed genus of orchids in the tribe Orchideae. About 880 species of Habenaria have been formally described. They are native to every continent except Antarctica, growing in both tropical and subtropical zones.

Shorea is a genus of about 47 species of mainly rainforest trees in the family Dipterocarpaceae. The timber of trees of the genus is sold under the common names lauan, luan, lawaan, meranti, seraya, balau, bangkirai, and Philippine mahogany.

Ribes is a genus of approximately 200 known species of flowering plants, predominantly native to the temperate regions of the Northern Hemisphere. Ribes is the sole genus in the plant family Grossulariaceae. The genus includes species commonly referred to as redcurrants, blackcurrants, whitecurrants, and gooseberries. Several species are cultivated both for their edible fruit and as ornamental plants in horticulture. Ribes are the main alternate host for white pine blister rust, a fungal pathogen impacting five-needle pines.

Rhododendron arboreum, the tree rhododendron, is an evergreen shrub or small tree with a showy display of bright red flowers. It is found in Bhutan, China, India, Myanmar, Nepal, Sri Lanka, Pakistan and Thailand. It is the national flower of Nepal.

Drosophyllum ( DROSS-oh-FIL-əm, rarely drə-SOF-il-əm) is a genus of carnivorous plants containing the single species Drosophyllum lusitanicum, commonly known as Portuguese sundew or dewy pine. In appearance, it is similar to the related genus Drosera (the sundews), and to the much more distantly related Byblis (the rainbow plants).