Himalayan pencil cedar (Juniperus polycarpos) is an evergreen tree distributed from Afghanistan, Baluchistan, Kagan valley, Kashmir, Lahaul-Spiti to upper reaches of western Tibet. In the western Himalaya treeline of the Juniperus polycarpos is not well defined because of the topographical barriers and variation in orography.

Cissampelos pareira L. and Tinospora cordifolia (Willd.) Hook.f. & Thoms inhibited the propagation of rodent parasite Plasmodium berghei in vivo. In a typical fourday experiment, the BALB/c mice were administered with ethanol extracts of Cissampelos pareira L. and Tinospora cordifolia (Willd.) Hook.f. & Thoms. The parasitaemian in untreated control group ranged between 17.31% and 30.02% whereas the root extracts of Cissampelos pareira L. and stem extracts of Tinospora cordifolia (Willd.) Hook.f. & Thoms resulted in inhibition of Plasmodium berghei significantly.