|Scientific Name||Sisymbrium altissimum||USDA PLANTS Symbol||SIAL2|
|Common Name||Tumble Mustard, Jim Hill Mustard||ITIS Taxonomic Serial No.||23312|
Life zones and habitat: Semi-desert to foothills (3500 to 9000 ft); grasslands, fields, roadsides and disturbed areas.
Plant: Erect, freely-branched annual up to 5 feet tall.
Leaves: Alternate leaves oblong in outline and up to 6 inches long, pinnately-lobed with 4 to 6 segments along each side; basal leaves with shallow lobes; stem leaves much more deeply lobed into linear segments almost appearing to be compound.
Inflorescence: Open racemes of pale yellow to yellow flowers; 4 petals about 1/4-inch long; sepals about half as long.
Bloom Period: May to October.
References: "Flora of Colorado" by Jennifer Ackerfield, Montana Plant Life and SEINet.
|BONAP Distribution Map
Map Color Key
© Tom Lebsack 2023
Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County