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Salsola tragus is an annual herb that can grow to 4 ft. (1.2 m) tall. It was introduced into the United States in the mid 1870s, possibly as a contaminant in flax seed.

Foliage

Leaves are alternate and narrow. Upper leaves have a sharp point at the apex and are 1.3-2 in. (3.3-5.1 cm) long.

Flowers

Flowering occurs from midsummer to fall, when small, pink to greenish flowers develop from the leaf axils. Each flower is subtended by 3, spine-tipped leaves.

Fruit

Fruits are 0.19-0.31 in. (4.8-7.9 mm) in diameter including the wings. Wings are opaque with smooth margins and veins.

Ecological Threat

After Salsola tragus matures it detaches from the root system and tumbles in the wind, spreading seed (like another common name “tumbleweed” suggests). It is native to Eurasia.

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Thu, 28 Mar 2024 20:19:30 -0400 Thu, 28 Mar 2024 20:19:30 -0400 http://Images.bugwood.org/ <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1459792 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1459792 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162018 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162018 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1363366 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1363366 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1363367 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1363367 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1363368 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1363368 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162024 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162024 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162030 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162030 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162022 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162022 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162029 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162029 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162031 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5162031 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5159096 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5159096 <![CDATA[Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5308087 Russian thistle Salsola tragus]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5308087