Clematis double white ?


 
https://08511630493324166816.googlegroups.com/attach/1ea5231647975/20180517_141738.jpg?part=0.3&view=1&vt=ANaJVrHRx3Arlo9DBCWGd47n6aQx4PsWtNM5_ZDb4ASjTvifMRfBPONN2SJGqRGwDWAEx-vbMGM3osCbDRRs5vff6TU0S_qlYJ1A92pcPHvOopDRoI1COoc
https://08511630493324166816.googlegroups.com/attach/1ea5231647975/20180517_141746.jpg?part=0.2&view=1&vt=ANaJVrE-bqY-tKvxbetVZjx3uxYtHUh58I0j-lYQeS5Irscm7-kH2RgGsNlaQ9BEsqEBA0O56xUlTfEIKlWXTSy0gYl62rk1XYtyR0gRZUkavp1rL4jmzAg
https://08511630493324166816.googlegroups.com/attach/1ea5231647975/20180517_141732.jpg?part=0.1&view=1&vt=ANaJVrEHzUqXBEBAm7SEqZ-51Oy1txjO34pRQrGGN0cwgMCfGu8aKJBm_siOM-CUDU9CEX63cZlLMREO-EhSe3xt-jvZVlvDKFXcs0Is2qD5QPmgbrfe8ec

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"....



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