|Scientific Name||Sisymbrium irio||USDA PLANTS Symbol||SIIR|
|Common Name||London Rocket||ITIS Taxonomic Serial No.||23314|
|Description||Habitat: Roadsides, fields, waste grounds, prairies, disturbed sites and desert areas.
Plant: Erect annual up to 24 inches tall; stems branching from base and above; herbage smooth to sparsely pubescent.
Leaves: Basal and stem leaves petiolate; basal leaves not in a rosette; stem leaves alternate, blades oblanceolate or oblong in outline, 1 to 4-3/4 inches long, pinnately-divided into 2-6 pairs of lobes; margins entire, dentate, or lobed; uppermost stem leaves sometimes not lobed.
Inflorescence: Small yellow flowers in terminal racemes on slender ascending pedicels; 4 green sepals; 4 yellow petals ~1/8-inch long.
Bloom Period: December to May.
Fruit: Long, very narrow, straight slender capsules, 3/4 to 2 inches long.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston and SEINet.
|BONAP Distribution Map
Map Color Key
Banner photo of Lupinus ssp. by Rick Capozza, Austin TX
© Tom Lebsack 2023