I do not think so. It looks different than what I show as a Merremia umbellata. For example the shape of the bud is very different.
For Convolvulaceae, features of the calyx, fruit and seeds, as well as the leaves are all more important than shape and colour of corolla for identification of genus and species. Photographs often fail to show these features.
If you widen your search to the genera, Merremia, you might find your plant. In addition to the floral information available in your image, consider leaf shape as well, as that will quickly narrow your search. I believe Convolvulaceae is the correct family - and can add that there are VERY few (if any) yellow flowered Convolvulaceae in cultivation in North America.
OP is in Colombia, Susan.... There are significantly more yellow-flowering Convolvulaceae in South America than you'd expect - it's a species diversity area. It's Merremia umbellata for me as well, which has zillions of synonyms (one of which is Ipomoea polyanthes....). It's not quite right to be Ipomoea ochraceae, which is the other close possiblity, but I associate that with a much lower-growing bine and with less intensely yellow flowers than the original photo suggests.
http://www.hear.org/species/merremia_umbellata/ take a look at this site. If I were you I too would be suspicious of so much variability (in leaf and solitary flower especially).
I know nothing about this, but shouldn't Merremia peltata have peltate leaves (with the petiole attached in on the blade, not on the edge)?
