Kalgan is about and potentilla.

In issue for help me patients asking a help for calming ache joints and spine in, am also had it, as strong hell aches on the night, insomnia in knees, waist, am not showed,what is to do..
Am used and my relatives these herbal recipes are of kalgan, comarum  palustre, potentilla erecta are power immune stimulants. Are also unique cartilages restoring, salts diluting, helping in curing joints, spine, gout, radiculitis, as 200 gr of chopped dried roots of comarum, and 100 gr of kalgan adding in jar in three l. of samogone, or spirit, and on 70 degrees, as infuse dark into for 21 days, shaking, filter, and use one tbl.sp. in 50 ml. of water for 3 times/day before meal, course for month, in ten days rest, add two courses.
For a result good of a cure use a remedy with rubbing, as same remedy using, or cook ointment of 200 gr  comarum, and 100 gr of kalgan, are chopping till powder, stew after lard or goose fat, cool, mixing in powder, as on 100 gr powder is one kg of fat, mixing with wood spoon, cold infuse. As for rubbing use one tbl.sp. of ointment warming, and rubbing in ache for ten minutes, closing  a hard sheet, and wrapping.