Lepidium perfoliatum

A weedy annual found in much of the western United States. Although the cauline leaves are simple, entire, and very strongly auriculate (not quite perfoliate in the strict sense), the basal leaves are petiolate and highly divided.

Flowers on Log Hill Mesa northwest of Ridgway, 13 Jun 2008.

Cauline leaf on Log Hill Mesa, 13 Jun 2008.

Plant habit on Log Hill Mesa, 13 Jun 2008.

Plant habit on the roadside on the south edge of Log Hill Mesa, along switchbacks above Ridgway valley, 13 Jun 2008.