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The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropical terrestrial ecoregions of the Americas and the entire South American temperate zone.
Amaranthaceae is a family of flowering plants commonly known as the amaranth family, in reference to its type genus Amaranthus. It includes the former goosefoot family Chenopodiaceae and contains about 165 genera and 2,040 species, making it the most species-rich lineage within its parent order, Caryophyllales.
A tumbleweed is a structural part of the above-ground anatomy of a number of species of plants. It is a diaspore that once it is mature and dry, detaches from its root or stem and rolls due to the force of the wind. In most such species, the tumbleweed is in effect the entire plant apart from the root system, but in other plants, a hollow fruit or inflorescence might detach instead. Xerophyte tumbleweed species occur most commonly in steppe and arid ecosystems, where frequent wind and the open environment permit rolling without prohibitive obstruction.
Amaranthus hybridus, commonly called green amaranth, slim amaranth, smooth amaranth, smooth pigweed, or red amaranth, is a species of annual flowering plant. It is a weedy species found now over much of North America and introduced into Europe and Eurasia.
Amaranthus wrightii is a species of flowering plant. It goes by the common name of Wright's amaranth. It occurs from western Texas into southern Arizona and as far north as Colorado at elevations between 500–2,000 m (1,600–6,600 ft).
Amaranthus hypochondriacus is an ornamental plant commonly known as Prince-of-Wales feather or prince's-feather. Originally endemic to Mexico, it is called quelite, blero and quintonil in Spanish.
Amaranthus spinosus, commonly known as the spiny amaranth, spiny pigweed, prickly amaranth or thorny amaranth, is a plant is native to the tropical Americas, but is present on most continents as an introduced species and sometimes a noxious weed. It can be a serious weed of rice cultivation in Asia.
Amaranthus retroflexus is a species of flowering plant in the family Amaranthaceae with several common names, including red-root amaranth, redroot pigweed, red-rooted pigweed, common amaranth, pigweed amaranth, and common tumbleweed.
Amaranthus albus is an annual species of flowering plant. It is native to the tropical Americas but a widespread introduced species in other places, including Europe, Africa, and Australia.
Amaranthus cruentus is a flowering plant species that yields the nutritious staple amaranth grain. It is one of three Amaranthus species cultivated as a grain source, the other two being Amaranthus hypochondriacus and Amaranthus caudatus. In Mexico, it is called huautli (Spanish pronunciation: [ˈwawtli] and alegría ([aleˈɣɾi.a] and in English it has several common names, including blood amaranth, red amaranth, purple amaranth, prince's feather, and Mexican grain amaranth. In Maharashtra, it is called shravani maath or rajgira. In Kerala, it is called chuvanna cheera or commonly, cheera.
The Flora of North America North of Mexico is a multivolume work describing the native plants and naturalized plants of North America, including the United States, Canada, St. Pierre and Miquelon, and Greenland. It includes bryophytes and vascular plants. All taxa are described and included in dichotomous keys, distributions of all species and infraspecific taxa are mapped, and about 20% of species are illustrated with line drawings prepared specifically for FNA. It is expected to fill 30 volumes when completed and will be the first work to treat all of the known flora north of Mexico.
Amaranthus acanthochiton, the greenstripe, is an annual plant species of the genus Amaranthus in the family Amaranthaceae. It is native to the southwestern United States and northern Mexico (Chihuahua), growing at elevations of 1000–2000 m where it is uncommon.
Amaranthus arenicola, commonly called sand amaranth or sandhill amaranth, is a plant species found in many states of the contiguous United States. It is an annual species found in sandy areas, near riverbeds, lakes, and fields. It is native to the central or south Great Plains, extending from Texas to South Dakota, and was introduced to other areas. This flowering plant can grow up to 2 meters in height.
Amaranthus australis is also known as southern amaranth or southern water-hemp. The plant usually grows from 1 to 3 m in height, though some have been known to grow up to 9 m (30 ft) high. The stems can be up to 30 cm in diameter. It is a herbaceous annual. It is found in many southern states of the United States, Mexico, the West Indies, and South America. They are frequently found in wetland areas. It is herbaceous, short lived perennial. The largest is 4.6 m (15 ft) tall.
Amaranthus blitoides, commonly called mat amaranth, prostrate pigweed, procumbent pigweed, prostrate amaranth, or matweed, is a glabrous annual plants species. It usually grows up to 0.6 m, though it may grow up to 1 m. It flowers in the summer to fall.
Amaranthus crispus is a species of flowering plant in the family Amaranthaceae. It is referred to by the common name crispleaf amaranth. It is a herbaceous, sparsely pubescent annual plant. It can grow up to 0.5 m (1.5 ft) in height. It flowers in summer to fall. It usually grows in waste places, disturbed habitats, or near water. It is native to Argentina, Chile and Uruguay and has been introduced into Australia, Austria, Bulgaria, Crimea, Czechoslovakia, France, Hungary, Italy, Romania, Sardinia, the United States, and Yugoslavia.
Amaranthus floridanus, the Florida amaranth, is a flowering plant endemic to Florida.
Amaranthus graecizans, the Mediterranean amaranth or short-tepalled pigweed, is an annual species in the botanical family Amaranthaceae. It is native to Africa, southern Europe, East Asia to India and Central Asia. It is naturalized in North America. More general common names include tumbleweed and pigweed.
Amaranthus tuberculatus, commonly known as roughfruit amaranth, rough-fruited water-hemp, tall waterhemp, or common waterhemp, is a species of flowering plant. It is a summer annual broadleaf with a germination period that lasts several months. Tall waterhemp has been reported as a weed in 40 of 50 U.S. states.
