Respected Sir Thanks a lot for providing the complete details. Since I am still not able to compare the descriptions correctly with plants so in case of these plants I have tried to differentiate the species on the basis of altitude. The plant written as D. brunonianum is found above 4000 meters asl in our area whereas the D. cashmerianum is mostly found below 4000 meters asl. Both these plants are common in our area and are used by transhumants for various religious ceremonies. The third plant is very rare and found only this single plant which was in young stage at that time. I have another Delphinium plant which I found only above 5000 meters asl. I am posting it on other thread.
Thanks and regards Suresh Rana

