Question: I am trying to find the scientific name of a plant called 'kissing over the garden gate'.
Answer: The plant you're looking for is Polygonum orientale, commonly called 'kiss-me-over-the-garden-gate'. The less attractive common name is Japanese Knotweed, an invasive weed in many parts of the country.
Q&A Library Searching Tips
When singular and plural spellings differ, as in peony and peonies, try both.