This plant was found at an elevation of 1120 m. photographed in August. I doubt that is sp. robertianum. Stalks and peduncles aren't red for a start and the form of the plant resembles more sp. lucidum. The corolla is also very pale! Help, help, help!
Of these two, I would prefer G. robertianum with its characteristic pinnatifid/double pinnatifid leaves. G. lucidum has more classic geranium-palmate leaves. The red pigment in the stems and leaves of many plants is quite variable feature and essentially depents on the lighting. More open sun - more red pigment (ultraviolet, my guess).
Thanks Andrey, In fact this specimen was found in a shady area, which as you say must account for it. Thanks again.
