Weed of the month submitted by Larry Walker
Elongated Mustard (Brassica elongata) is a biennial plant native to Eastern Europe. It is widespread in some counties of Colorado; yet, fortunately, not reported in others. It's also known as Long-staked Rape.
Many western species in the mustard family bear similar fruit and flowers, but the lance-shaped leaves of the Elongated Mustard differentiate it from other species. Distinguishing characteristics include--
* Yellow flowers with four petals and six stamens
* Blooms from June through July
* Fruits are "siliques" that can be 1.5 inches long with a stalk-
like base and a seedless, narrow beak.
* Basal leaves are lance-shaped and weakly lobed, while stem
leaves are much smaller and do not clasp the stem
* Can grow up to 3 feet tall
* Reproduces by seed in late summer or early fall; cold
temperatures restrict germination and the spread of its