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Amaranthus hybridus, commonly called green amaranth, [2] slim amaranth, [3] 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 is a cosmopolitan group of more than 50 species which make up the genus of annual or short-lived perennial plants collectively known as amaranths.Some of the better known names include "prostrate pigweed" and "love lies bleeding".
Amaranthus graecizans, the Mediterranean amaranth [2] or short-tepalled pigweed, [3] is an annual species in the botanical family Amaranthaceae. It is native to Africa, southern Europe, East Asia to India and Central Asia. [4] It is naturalized in North America. More general common names include tumbleweed and pigweed. [5]
Pigweed can mean any of a number of weedy plants which may be used as pig fodder: Amaranthus species Amaranthus albus, white pigweed, tumble pigweed; Amaranthus blitoides, prostrate pigweed; Amaranthus californicus, California pigweed; Amaranthus fimbriatus, fringed pigweed; Amaranthus hybridus, smooth pigweed
Amaranthus retroflexus, true to one of its common names, forms a tumbleweed. [4] It is an erect, annual herb growing to 1 m ( 3 + 1 ⁄ 2 ft). [ 5 ] The leaves are nearly 15 cm (6 in) long on large individuals, the ones higher on the stem having a lance shape and those lower on the plant diamond or oval in shape.
It has several common names, including carelessweed, [1] dioecious amaranth, [2] Palmer's amaranth, Palmer amaranth, and Palmer's pigweed. It is native to most of the southern half of North America. Populations in the eastern United States are probably naturalized .
Amaranthus albus is an annual herb growing up to 50 centimetres (20 in) tall, forming many branches. Larger specimens turn into tumbleweeds when they die and dry out. The plant creates small, greenish flowers in clumps in the axils of the leaves.
Amaranthus blitoides, commonly called mat amaranth, [1] prostrate pigweed, [2] 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 (3 feet).