Khan Saheb a lot of clematis are rated upto zone 11. Means should so find in Lahore. Mostly the smaller flowers ones like the viticella and texansis varieties which are Group 3. One can expect some group 2 varieties to do reasonably well also if planting location is chosen wisely.
Yes Dr sb some years back it was in my garden but i lost the two bushes.Its true name is Maria Callas & its bred by French breeder Meilland. Its pink to red & has stronger fragrance than Signature specially in the early morning.Its a robust grower.I replaced Maria Callas with Bewitched.Maria Callas is sold in the US as Miss All American Beauty.