After reading the links y'all found, I'm inclined to think what I saw was either a hybrid or an improved cultivar of some sort. It could have been at least three of the named cultivars seen in some of the photos. Might depend on the height or some other variance to determine the distinguishing feature that differentiates one from another. At least M. erythrophylla was described as having red bracts in several of the links this one was most definitely not red. It was the deep pink of some of those old fashioned cabbage roses. True pink, not some lavender or lilac or faded red color. Guess keeping it labeled as Mussaenda will have to be enough. Thanks. I wonder that it's not grown more like Brugmansias. Sounds like it wouldn't be too much different to grow.