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The Collaborative International Dictionary
Chenopodium Vulvaria

Notchweed \Notch"weed`\, n. (Bot.) A foul-smelling weed, the stinking goosefoot ( Chenopodium Vulvaria).

Wikipedia
Chenopodium vulvaria

Stinking goosefoot (Chenopodium vulvaria), or notchweed, is a foul-smelling plant or weed. The plant is a member of the genus Chenopodium, the goosefoots.