SK1290 15 JUL 2018 : 9 posts by 4 authors. Attachments (3)

Location:  Kalimpong, WB, India
Date: 11 May 2018
Altitude: 4000 ft.
Habit : Cultivated
Which Clematis is this ?

Clematis ‘Maria Sklodowska Curie’ ??

Clerodendrum philippinum Schau, Cashmere Bouquet.- cultivated ornamental shrub (Lamiaceae)

not  Clerodendrum philippinum Schau.

that makes a bunch of smaller rose like flowers
we have had some cases here including one from … himself 
synonym Clerodendrum chinense 
this is one large flower
do you have dimensions of the flower? 

chelsea flower show 2014 had three cultivars displayed and written about

may be your is yet another variant of Clematis ‘Maria Sklodowska Curie
although i would have liked to have the flower in pristine condition in your plant and had leaves to compare 

It is not Clerodendron Sp.
Comment from … on FB! Very hard to say as there are several similar ones, Google on “clematis double white”….