Dear Garg ji,
The plant shared by Sam ji looks different, particularly the pubescens in leaves is very less (it's not tomentose) and I can see some of the spike-like heads are narrow, cylindrical and more than 3 times longer than broad. Additionally in his plants the inflorescence is pale colored and not dark purplish, so his plant may not be C. scaber though it's tough to confirm without floral dissections.
As per the below mentioned key his plants are not even completely matching the other species C. wightii as the inflorescence is not 3-6 branched in his plants.
Spike-like head ovoid to ovoid-cylindric, less than 3 times as long as broad, purplish in appearance when dry; axis usually simple, rarely 2 - 3-branched; fruiting calyx tube purplish-brown villous - C. scaber
Spike-like head long and narrow cylindrical, more than 3 times as long as broad, black in appearance when dry; axis usually with 3-6 branches; fruiting calyx tube white villous - C. wightii