Submitted by Gateshead Rangers
No interactions present.
Easy way to distinguish between this and C. sepum (Hedge bindweed) is to look at the bracts, at the base of the white petals.
If they overlap - as you can clearly see in the right-hand flower in your photo - then it's silvatica.
If the two bracts only just meet, without overlapping, (or only overlapping very slightly) then it's sepum.
I used to have an Aunt Sylvia who was very "huggy".... so if the bracts are "hugging" the flower, then it's Aunt Silvatica...
There is also (allegedly) a difference in the shape of the leaves' basal sinus, but testing this out in the field has made me doubt it.
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
Lat/Lng: 54.9524, -1.6973
OS grid ref: NZ194620
Growing in scrub by the River Derwent