Flowering shrub

I just read that there is only one species of Poinsettia, Euphorbia pulcherrima, which has red bracts. When I was in Thailand, up in the Northern mountains on the Burmese border, we saw Poinsettia bushes with both red and yellow bracts, so I added Thailand to the search and came up with 18 species of Euphorbia, but they are all cultivated. We saw the plants at Doi Ang Khang which is a research centre for plants and vegetables. I can find nothing of Ponsettia growing wild in Borneo. They do grow wild in my garden in Spain though. My wife thinks this may be a species f Pieris, which also have red Bracts