unknown plant from Montana

Submitted by Ault on Sat, 10/27/2012 - 09:13

Can someone identify the plants in the attached image? This was growing on vertical limestone on the approach to HogBack Mountain, east of Helena, Montana. The plants were upwards of 3 feet across. Amazing cliff-hugging adaptability. No close-up, as I had to use a telephoto to pull in the plants.


Jim Ault
N. Illinois, USA