- To 1m tall, somewhat branching above, pubescent, herbaceous.
- Alternate, lanceolate, typically sessile, toothed(dentate) or rarely entire, pubescent above and below, to +/-12cm long, +4cm broad.
- Terminal racemes to +30cm tall.
- Corolla purple to blue purple,(other colors seen in cultivation), to 2cm broad. Petals 4, clawed, glabrous. Claw to -1cm long. Limb to +/-1cm long, 8mm broad, emarginate. Stamens 6, 4 closest to ovary longer than outer opposing 2, included. Stigma 2-lobed. Sepals 4, purple, erect and forming mock tube around petal claws, to 6mm long, 1.5mm broad.
- Cylindrical siliques to +10cm long.
- May - August.
- Disturbed sites, waste ground, thickets, open woods, roadsides, railroads. Also cultivated.
- Native to Europe.
- This is one of the most showy members of the
. The flowers are typically much more blue-purple than appear in the top picture. The plant is quite common.
Photographs taken at the Kansas City Zoo, 5-8-00, and off Hwy 29, Guilford County, NC., 4-23-03.
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all
Federal and State Noxious Weeds
This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of
Weeds of the U.S.
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