Sunday, April 17, 2016

Chenopodium album

Chenopodium album is a fast-growing weedy annual plant in the genus Chenopodium.

Though cultivated in some regions, the plant is elsewhere considered a weed. Common names include lamb's quarters, melde, goosefoot and fat-hen, though the latter two are also applied to other species of the genus Chenopodium, for which reason it is often distinguished as white goosefoot. It is sometimes also called pigweed, however, pigweed is also a name for a few weeds in the family Amaranthaceae, it is for example used for the redroot pigweed (Amaranthus albus).

Chenopodium album is extensively cultivated and consumed in Northern India as a food crop.

Its native range is obscure due to extensive cultivation, but includes most of Europe, from where Linnaeus described the species in 1753. Plants native in eastern Asia are included under C. album, but often differ from European specimens.It is widely introduced elsewhere, e.g. Africa, Australasia, North America, and Oceania,and now occurs almost everywhere in soils rich in nitrogen, especially on wasteland.

It tends to grow upright at first, reaching heights of 10–150 cm (rarely to 3 m), but typically becomes recumbent after flowering (due to the weight of the foliage and seeds) unless supported by other plants. The leaves are alternate and can be varied in appearance. 

The first leaves, near the base of the plant, are toothed and roughly diamond-shaped, 3–7 cm long and 3–6 cm broad. The leaves on the upper part of the flowering stems are entire and lanceolate-rhomboid, 1–5 cm long and 0.4–2 cm broad; they are waxy-coated, unwettable and mealy in appearance, with a whitish coat on the underside. The small flowers are radially symmetrical and grow in small cymes on a dense branched inflorescence 10–40 cm long.

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