POTENTILLA CONCINNA Richardson, Frank. Journ. 736. 1823.
P. concinna resembles P. rrivea in many respects, especially the variety quinquefolia, but is always more or less prostrate, and has broader petals and sepals. It is very variable as to the shape of the leaves. In the typical form the leaflets are obovate or cuneate and crenate, and slightly tomentose also on the upper surface. It ranges from Colorado to Utah and Saskatchewan.
Potent/ha concinna kumistrata Rydberg, Cont. U. S. Nat. Herb. 3: 497 (P. concinna hung/User Lehm. Rev. Pot. 112. P. humifusa Nutt. Gen. I: 310.) is a less spreading form with leaves that are green on the upper surface, but the two forms grade into each other in so many ways that it is useless to try to draw a line be tween them.