Pergularia tomentosa is a perennial shrub that can survive in periods of extended drought. It was noted in several locations in both lower and upper reaches of Karkur Talh, however it is clearly more common in the upper rocky sections (a single example was seen in lower Karkur Talh). It is relatively abundant in the valleys of the Hassanein Plateau.The species was not noted in the western, granitic part of the mountain.

Hassanein Plateau (Jebel Uweinat), 2004-2006

Upper Karkur Talh (Jebel Uweinat), November 2003, October 2006 (same individual noted several times subsequently)

Upper Karkur Talh (Jebel Uweinat), November 2004 / October 2005

South western branch of Karkur Talh (Jebel Uweinat), October 2006