witchweed - Definition. Was ist witchweed
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Was (wer) ist witchweed - definition

GENUS OF PLANTS
Witchweed; Striga (plant)
  • ''[[Striga bilabiata]]''
  • ''[[Striga asiatica]]''
  • Plant roots with connected ''Striga'' plant

witchweed         
¦ noun a small parasitic plant which attaches itself to the roots of maize, sugar, and other plants. [Genus Striga.]
Striga         
Striga, commonly known as witchweed, is a genus of parasitic plants that occur naturally in parts of Africa, Asia, and Australia. It is currently classified in the family Orobanchaceae, although older classifications place it in the Scrophulariaceae.
Striga asiatica         
SPECIES OF PLANT
Asiatic witchweed; Asiatic Witchweed; Striga lutea
Striga asiatica, the Asiatic witchweed or the red witchweed, is a hemiparasitic plant in the family Orobanchaceae. It is native to Asia and sub-Saharan Africa, but has been introduced into other parts of the world including Australia and the United States.

Wikipedia

Striga

Striga, commonly known as witchweed, is a genus of parasitic plants that occur naturally in parts of Africa, Asia, and Australia. It is currently classified in the family Orobanchaceae, although older classifications place it in the Scrophulariaceae. Some species are serious pathogens of cereal crops, with the greatest effects being in savanna agriculture in Africa. It also causes considerable crop losses in other regions, including other tropical and subtropical crops in its native range and in the Americas. The generic name derives from Latin strī̆ga, "witch."

Witchweeds are characterized by bright-green stems and leaves and small, brightly colored and attractive flowers. They are obligate hemiparasites of roots and require a living host for germination and initial development, though they can then survive on their own.

The number of species is uncertain, but may exceed 40 by some counts.