[2] Its stems are spreading, finely hairy, generally having three slender nodal spines, 7–12 millimetres (1⁄4–1⁄2 inch) long.

The white or light-pink petals are 4–6 mm long, broad and fanlike, and curl back away from the flower-face, and towards the flower stem.

The calyces are red and hairy, with 10–13 mm long lobes that are oblong and narrow, coming to a point.

R. lobbii prefers mesic to dry streambanks, rock outcrops, open woodlands and forests in the lowland and montane zones.

[2] It is more frequent in the drier Pacific portion of its range where it is often a characteristic plant, rather than in the wetter Cordilleran, where it can be locally rare.

[3] It is found in the state of Washington in Wahkiakum, Skamania, Klickitat, Kittitas, Chelan, Pierce, Thurston and Clallam counties.