Salsola kali

Many tumbleweeds (genus Salsola, section Kali) are important roadside, rangeland and agricultural weeds native to much of Europe, North Africa, the Middle East, Central Asia, China and Australia. Species have also been widely introduced accidentally as contaminants of crop and pasture seeds, and tumbleweed has become a widespread weed in Canada, USA, Mexico, Chile, China, Indonesia, Japan, Australia and New Zealand. S. kali and it many confused synonyms (including S. tragus and others which are disputed, such as S. iberica and S. australis) are common agricultural, rangeland and environmental weeds with multiple and important impacts. Major efforts have been made regarding mechanical, chemical and, more recently, biological control.