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The name Amaranthus lividus has been widely used for A. blitum, in addition to other Linnaean names (see F. Fillias et al. 1980; J. P. M. Brenan and C. C. Townsend 1980; R. K. Brummitt 1984). Amaranthus blitum is of tropical origin and not common in temperate regions. It has been cultivated in Europe as a minor leaf-vegetable crop, but now it is declining and its range is becoming progressively smaller. In many temperate countries (in particular in Europe), A. blitum persists mostly as an uncommon and sporadic weed in greenhouses, ornamental gardens, and flower beds.

In Europe, it may be possible to distinguish two or three subspecies within Amaranthus blitum. The occurrence and distribution of infraspecific taxa of the A. blitum complex is insufficiently known in North America and requires additional floristic and taxonomic studies, although it appears that the most common is subsp. polygonoides (Moquin-Tandon) Cattetero. Some literature records of A. blitum from southern regions of North America are misidentifications of A. viridis, and vice versa; because of that the distributions of these two species in the flora area require critical reassessment.

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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
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Flora of North America Vol. 4: 413, 414, 428, 429 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Description

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Plants annual, glabrous. Stems ascending to prostrate, sometimes erect, simple or branched, sometimes radiating from base and forming mats, 0.1-0.6 m. Leaves: petiole usually equaling to 2 times as long as blade; blade ovate or obovate, 1-6 × 0.5-4 cm, base tapering or cuneate, margins entire, plane, apex distinctly emarginate to almost bilobate, mucronate. Inflorescences slender terminal spikes or panicles and also axillary clusters, in some forms only axillary clusters are present; spikes erect or sometimes reflexed, green , leafless at least distally. Bracts of pistillate flowers lanceolate, inconspicuous, 0.5 mm, shorter than tepals. Pistillate flowers: tepals 3, elliptic or spatulate, not clawed, equal or subequal, 0.8-1.5 mm, margins entire, apex broadly acute; style branches erect; stigmas 3. Staminate flowers clustered at tips of spikes; tepals 3; stamens 3. Utricles compressed, subglobose to obovate, 1.2-2.5(-3) mm, exceeding tepals, smooth or faintly rugose, indehiscent. Seeds black or dark reddish brown, subglobose or broadly lenticular, (0.8-)1-1.8 mm diam., smooth, shiny, filling fruit almost completely.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 4: 413, 414, 428, 429 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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eFloras.org
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Description

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Stem ascending, light green or purple, 10-30 cm tall, branched from base, glabrous. Petiole 1-3.5 cm; leaf blade ovate or ovate-rhombic, 1.5-4.5 × 1-3 cm, base cuneate, margin entire or slightly undulate, apex notched, with a mucro. Flower clusters axillary, those of terminal clusters erect spikes or complex thyrsoid structures. Bracts and bracteoles oblong, shorter than 1 mm. Tepals light green, oblong or lanceolate, 1.2-1.5 mm, with a midvein adaxially, apex acute. Stamens slightly shorter than perianth; stigmas 3 or 2, falling off when utricles ripen. Utricles exceeding perianth, compressed-ovoid, ca. 3 mm, indehiscent, slightly rugose to nearly smooth. Seeds black to brownish black, circular, ca. 1.2 cm in diam. Fl. Jul-Aug, fr. Aug-Sep. 2n = 34.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
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Flora of China Vol. 5: 421 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of China @ eFloras.org
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Wu Zhengyi, Peter H. Raven & Hong Deyuan
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Distribution

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introduced; Ont., Que.; Ala., Calif., Fla., Ga., La., Md., Mass., Miss., N.H., N.J., N.Y., N.C., Ohio, Pa., S.C., Tex., Utah, Va.; Central America; South America; Eurasia; Africa.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 4: 413, 414, 428, 429 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flowering/Fruiting

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Flowering summer-fall (almost year-round in tropics, subtropics).
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 4: 413, 414, 428, 429 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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Habitat

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Waste places, fields, roadsides, other disturbed habitats; 0-1000m.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 4: 413, 414, 428, 429 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Habitat & Distribution

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Fields, waste places. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Yunnan, Zhejiang [Japan, Laos, Nepal, Sikkim, Vietnam; N Africa, Europe, South America].
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cc-by-nc-sa-3.0
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of China Vol. 5: 421 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of China @ eFloras.org
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Wu Zhengyi, Peter H. Raven & Hong Deyuan
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eFloras.org
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Synonym

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Amaranthus ascendens Loiseleur; A. lividus Linnaeus
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 4: 413, 414, 428, 429 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Synonym

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Amaranthus ascendens Loiseleur-Deslongchamps; A. lividus Linnaeus; A. lividus var. ascendens (Lois) Thellung-Blom; Euxolus ascendens (Loiseleur-Deslongchamps) H. Hara.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of China Vol. 5: 421 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of China @ eFloras.org
editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
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eFloras.org
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Amaranthus blitum

provided by wikipedia EN

Amaranthus blitum, commonly called purple amaranth[1] or Guernsey pigweed,[2] is an annual plant species in the economically important plant family Amaranthaceae.

Description

Amaranthus blitum is an erect or semi-prostrate annual plant. The single or branched stem can grow to one metre (three point three feet) tall. The green or purplish leaves are up to 10 cm (4 in) long on stalks of a similar length and are arranged spirally. They are simple, roughly triangular in shape and have entire margins. The inflorescence is a spike with the tiny male and female flowers clustered together. The fruits are small globular capsules containing disc-shaped seeds.[3]

Distribution and habitat

Native to the Mediterranean region, it is naturalized in other parts of the world, including much of eastern North America,[1] much of tropical Africa, Western Europe and Japan.[3] In Britain it was first recorded in the wild in 1771 when it appeared in Essex. It occurred more frequently in scattered locations in southern England in the 19th century but has since decreased. It is established in Guernsey and elsewhere as a casual plant, springing up on waste ground, rubbish tips and cultivated areas, probably from wool waste, coconut fibre or birdseed.[3]

Uses

Culinary

Although not cultivated, this plant is gathered from the wild and eaten in many parts of the world.[4] The Greeks call the Amaranthus blitum var. silvestre, vlita (Modern Greek: βλίτα), and eat the leaves and the tender shoots cooked in steam or boiled and then served with olive oil, lemon and salt. Similarly, it is also picked as young shoots in Lebanon and cooked in olive oil, onion, chilli, and burghul, seasoned with salt and drizzled with lemon juice before eating with pita bread. It is considered a side dish and particularly popular in the north of Lebanon.[3]

Related plants

The closely related Amaranthus viridis, the slender amaranth or green amaranth, is also widely eaten.[5]

References

  1. ^ a b USDA, NRCS (n.d.). "Amaranthus blitum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 7 January 2016.
  2. ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
  3. ^ a b c d Grubben, G.J.H. (2004). Vegetables. PROTA. pp. 63–65. ISBN 978-90-5782-147-9.
  4. ^ Grubben, G.J.H. & Denton, O.A. (2004) Plant Resources of Tropical Africa 2. Vegetables. PROTA Foundation, Wageningen; Backhuys, Leiden; CTA, Wageningen.
  5. ^ Grubben, G.J.H. (2004). Vegetables. PROTA. p. 88. ISBN 978-90-5782-147-9.

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Amaranthus blitum: Brief Summary

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Amaranthus blitum, commonly called purple amaranth or Guernsey pigweed, is an annual plant species in the economically important plant family Amaranthaceae.

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