Synonym: Nasturtium perfoliatum
The photo above shows a close-up of the inflorescence of clasping pepperweed as seen near the Odessa Craters near Odessa, WA...............April 28, 2007.
Clasping pepperweed is an easy to identify weed due to the heart-shaped, clasping leaves found on its stems. It is a winter annual or annual, with erect stems branching near the top. The stems range from 20-60 cm in height. The stem has two sets of leaves, with the lower ones dissected (bi- or tri- pinnatifid) and from 2-15 cm long while the upper ones are heart-shaped with clasping bases measuring from 3-30 mm long.
The flowers are white or yellow in dense racemes. The petals are about 1.5 mm long and have a narrow spatulate limb. The oval sepals are 1 mm long. The pedicels range from 2-5 mm long. The seed capsules are rhombic-ovate to orbicular silicles about 4 mm long and about 4 mm wide.
Clasping pepperweed is a weedy species of disturbed, open areas such as grain fields, pastures, waste areas, and roadsides.
Although it is a native of Europe, clasping pepperweed has become well established in much of the western United States.
The photo above shows clasping pepperweed from the road to Blue Sky, Hart Mt. National Antelope Preserve..........6/29/97.