Amaranthus retroflexus
L.
Familia
AMARANTHACEAE
Bledo
Amaranthus retroflexus, commonly known as pigweed, wild amaranth or
redroot weed, is an annual herbaceous plant belonging to the
Amaranthaceae family. Although native to North and Central America, it
has become naturalised almost worldwide and often grows spontaneously in
cultivated fields, vegetable gardens, along paths and on disturbed land.
It is an erect plant that can reach between 30 and 100 cm in height,
with sturdy, branched stems that are usually hairy at the top.
It has
a distinctive reddish or pinkish taproot, a characteristic that gives it
its common name in English.
Its leaves are alternate, ovate to
rhomboid in shape, and have entire or wavy margins.
It develops
dense, compact, spiny green spikes at the tips of its stems, composed of
numerous tiny flowers that appear from summer to autumn.
It is known
for being an aggressive and competitive weed in summer crops (such as
maize and soya), significantly reducing agricultural yields due to its
high seed production and resistance to certain herbicides.
Despite
its reputation as a weed, the young leaves are edible and are eaten
cooked in a similar way to spinach. Its small black seeds have also
historically been used as grain.
It can accumulate high levels of
soil nitrates, making it potentially toxic to livestock (particularly
pigs and cattle) if consumed in large quantities.
El Hierro, Tenerife, Gran Canaria, Lanzarote