Plants named in 1803

An apple is the round, edible fruit of an apple tree (Malus spp.). Fruit trees of the orchard or domestic apple (Malus domestica), the most widely grown in the genus, are cultivated worldwide. The tree originated in Central Asia, where its wild ancestor, Malus sieversii, is still found. Apples have been grown for thousands of years in Eurasia before they were introduced to North America by European colonists. Apples have cultural significance in many mythologies (including Norse and Greek) and religions (such as Christianity in Europe). Apples grown from seeds tend to be very different from

Petunia is a genus of 20 species of flowering plants of South American origin. The popular flower of the same name derived its epithet from the French, which took the word pétun, 'tobacco', from a Tupi–Guarani language. A tender perennial plant, most of the varieties seen in gardens are hybrids (Petunia × atkinsiana, also known as Petunia × hybrida).

Pinus sibirica, or Siberian pine, in the family Pinaceae is a species of pine tree that occurs in Siberia from 58°E in the Ural Mountains east to 126°E in the Stanovoy Range in southern Sakha Republic, and from Igarka at 68°N in the lower Yenisei valley, south to 45°N in central Mongolia.

Populus tremuloides is a deciduous tree native to cooler areas of North America, one of several species referred to by the common name aspen. It is commonly called quaking aspen, trembling aspen, American aspen, mountain or golden aspen, trembling poplar, white poplar, and popple, as well as others. The trees have tall trunks, up to 25 metres (82 feet) tall, with smooth pale bark, scarred with black. The glossy green leaves, dull beneath, become golden to yellow, rarely red, in autumn. The species often propagates through its roots to form large clonal groves originating from a shared root

Jack pine (Pinus banksiana), also known as grey pine or scrub pine, is a species of North American pine.

Elodea canadensis (American waterweed or Canadian waterweed or pondweed) is a perennial aquatic plant, or submergent macrophyte, native to most of North America. It has been introduced widely to regions outside its native range.

Elodea is a genus of eight species of aquatic plants often called the waterweeds described as a genus in 1803. Classified in the frog's-bit family (Hydrocharitaceae), Elodea is native to the Americas and is also widely used as aquarium vegetation and laboratory demonstrations of cellular activities. It lives in fresh water. An older name for this genus is Anacharis, which serves as a common name in North America. The introduction of some species of Elodea into waterways in parts of Europe, Australia, Africa, Asia, and New Zealand has created a significant problem and it is now considered a

Carex buxbaumii is a species of sedge known as Buxbaum's sedge or club sedge. It is native to much of the northern Northern Hemisphere, from Alaska to Greenland to Eurasia, and including most of Canada and the United States. It grows in wet habitat, such as marshes and fens. This sedge grows in clumps from long rhizomes. The stems are 75–100 cm (30–39 in) in maximum height. The leaves are narrow and small. The inflorescence has a bract which is sometimes longer than the spikes. The fruits have dark-colored bracts and a sac called a perigynium or utricle which is gray-green and rough in

Ampelopsis, commonly known as peppervine or porcelainberry, is a genus of climbing shrubs, in the grape family Vitaceae. The name is derived from the Ancient Greek: ἅμπελος (ampelos), which means "vine". The genus was named in 1803. It is disjunctly distributed in eastern Asia and eastern North America extending to Mexico. Ampelopsis is primarily found in mountainous regions in temperate zones with some species in montane forests at mid-altitudes in subtropical to tropical regions. Ampelopsis glandulosa is a popular garden plant and an invasive weed.

Schisandra, the magnolia vines, is a genus of twining shrubs that generally climb on other vegetation. Various authors have included the plants in the Illiciaceae Schisandra (also spelled Schizandra) is native to Asia and North America, with a center of diversity in China. Some species are commonly grown in gardens as ornamentals. It is a hardy deciduous climber which thrives in almost any kind of soil; its preferred position is on a sheltered, shady wall. It may be propagated by cuttings of half-matured shoots in August. Despite its common name "magnolia vine", Schisandra is not closely

Nolina is a genus of temperate and tropical xerophytic flowering plants belonging to the family Asparagaceae. The native distribution of the genus includes most of Mexico and the southern regions of the United States north to Nevada and Colorado. Especially in the USA, members of the genus are known as beargrass, some of which are cultivated as ornamental plants. Nolina species grow large rosettes of many leaves, with many species forming large, erect trunks, with some species branching to contain multiple rosettes of leaves, while others are stemless. They are typically large plants, and are

Malus baccata is an Asian species of apple known by the common names Siberian crab apple, Siberian crab, Manchurian crab apple and Chinese crab apple. It is native to many parts of Asia, but is also grown elsewhere as an ornamental tree and for rootstock. It is used for bonsai. It bears plentiful, fragrant, white flowers and edible red to yellow fruit of about 1 cm (3⁄8 in) diameter.

Lespedeza is a genus of some 45 species (including nothospecies) of flowering plants in the pea family (Fabaceae), commonly known as bush clovers or (particularly East Asian species) Japanese clovers (hagi). The genus is native to warm temperate to subtropical regions of eastern North America, eastern and southern Asia and Australasia. These shrubby plants or trailing vines belong to the "typical" legumes (Faboideae), with the peas and beans, though they are part of another tribe, the Desmodieae. Therein, they are treated as type genus of the smaller subtribe Lespedezinae, which unites the

Carex aquatilis is a species of sedge known as water sedge and leafy tussock sedge. It has a circumboreal distribution, occurring throughout the northern reaches of the Northern Hemisphere. It grows in many types of mountainous and arctic habitat, including temperate coniferous forest, alpine meadows, tundra, and wetlands. There are several varieties of this species, and it is somewhat variable in appearance. It produces triangular stems reaching heights between 20 cm (8 in) and 1.5 m (5 ft), and generally does not form clumps as some other sedges do. It grows from a dense rhizome network

Vitis riparia Michx, with common names riverbank grape or frost grape, is a vine indigenous to North America. As a climbing or trailing vine, it is widely distributed across central and eastern Canada and the central and northeastern parts of the United States, from Quebec to Texas, and eastern Montana to Nova Scotia. There are reports of isolated populations in the northwestern USA, but these are probably naturalized. It is long-lived and capable of reaching into the upper canopy of the tallest trees. It produces dark fruit that are appealing to both birds and people, and has been used

Pinus massoniana, commonly known as Masson's pine or Chinese red pine, is a species of pine, native to Taiwan, a wide area of central and southern China, including Hong Kong, and northern Vietnam. The specific Latin epithet massoniana refers to the distinctive shape of the species' leaves, which resemble a horse's tail. Hence, its Chinese common name 馬尾松, lit. 'horse-tail pine'.

Sparganium angustifolium is a species of flowering plant in the cat-tail family known by the common names floating bur-reed and narrowleaf bur-reed. It has a circumboreal distribution, occurring throughout the northern latitudes of the Northern Hemisphere. It is an aquatic plant, growing in water up to 2.5 meters deep. Its habitat includes acidic, low-nutrient freshwater bodies such as ponds, lakes, slow-moving streams, and ditches. It can become abundant, practically covering the surface of the water. It is a perennial herb producing a floating stem with long, narrow, flattened leaves which

Potamogeton alpinus is a species of perennial aquatic plant known by the common names alpine pondweed and red pondweed. It is widespread in the northern hemisphere in both rivers and lakes with good water quality.

Diplazium esculentum, the vegetable fern, is an edible fern found throughout Asia and Oceania. It is probably one of the most commonly consumed ferns. The genus Diplazium is in the family Athyriaceae, in the eupolypods II clade of the order Polypodiales, in the class Polypodiopsida.

Pinus serotina, the pond pine, black bark pine, bay pine, marsh pine, or pocosin pine, is a pine tree found along the Southeastern portion of the Atlantic coastal plain of the United States, from southern New Jersey south to Florida and west to southern Alabama. Pond pine distribution may be starting to spread west towards Mississippi and Tennessee.

Schistostega pennata, also called goblin gold, Dragon's gold, luminous moss or luminescent moss, is a haplolepidous moss (Dicranidae) known for its glowing appearance in dark places. It is the only member of the family Schistostegaceae.

Populus grandidentata, commonly called large-tooth aspen, big-tooth aspen, American aspen, Canadian poplar, or white poplar, is a deciduous tree native to eastern North America.

Lumnitzera is an Indo-West Pacific mangrove genus in the family Combretaceae. An English common name is black mangrove. (However, "black mangrove" may also refer to the unrelated genus Avicennia.) Lumnitzera, named after the German botanist, Stephan Lumnitzer (1750-1806), occurs in mangroves from East Africa to the Western Pacific (including Fiji and Tonga), and northern Australia. The genus has two species of similar vegetative appearance but with differing flower colour. Lumnitzera littorea has red flowers whereas Lumnitzera racemosa has white flowers. Both species have flat and

Vitis rotundifolia, or muscadine, is a grapevine species native to the southeastern and south-central United States. The growth range extends from Florida to New Jersey coast, and west to eastern Texas and Oklahoma. It has been extensively cultivated since the 16th century. The plants are well-adapted to their native warm and humid climate; they need fewer chilling hours than better known varieties, and thrive in summer heat. Muscadine berries may be bronze or dark purple or black when ripe. Wild varieties may stay green through maturity. Muscadines are typically used in making artisan wines,

Malus spectabilis (Chinese: 海棠; pinyin: hǎitáng) is a species of crabapple known by the common names Asiatic apple, Chinese crab, HaiTang and Chinese flowering apple.

Malus prunifolia is a species of crabapple tree known by the common names plumleaf crab apple, plum-leaved apple, pear-leaf crabapple, Chinese apple and Chinese crabapple. It is native to China. The number of chromosomes is 2n = 34.

Carex microglochin, called the fewseeded bog sedge and bristle sedge, is a species of flowering plant in the genus Carex, native to temperate and subarctic North America, South America, Europe and Asia. It is uncertain which hemisphere it originated on before dispersing to the other.

Betula glandulosa, the American dwarf birch, also known as resin birch or shrub birch, is a species of birch native to North America.

Vitis aestivalis, the summer grape, or pigeon grape is a species of grape native to eastern North America from southern Ontario east to Maine, west to Oklahoma, and south to Florida and Texas. It is a vigorous vine, growing to 10 m or more high on trees. The leaves are 7–20 cm long, suborbicular, and usually a little broader than long; they are variable in shape, from unlobed to deeply three- or five-lobed, green above, and densely hairy below. The flowers are produced at every third node in a dense panicle 5–15 cm long. The fruit is a small grape 5–14 mm diameter, dark purple or black in

Pachysandra is a genus of five species of evergreen perennials or subshrubs, belonging to the boxwood family Buxaceae. The species are native to eastern Asia and southeast North America, some reaching a height of 20–45 cm (7.9–17.7 in), with only weakly woody stems. The leaves are alternate, leathery, with a coarsely toothed margin, and are typically 5–10 cm (2.0–3.9 in) long. The small uni-sexual blooms are greenish-white and produced in late spring or early summer.