This little plant is Spigelia pulchella, which I don't believe has a common name in English. They're endemic to Bahia, Brazil, and found only in the dry, rocky, fire-prone campo rupestre habitat. This one is still in bud, probably to the disappointment of the little bee in the photo. I loved the curve of its inflorescence!
The specific epithet "pulchella" (second word in a scientific name) means "pretty", though, and I think "pretty pinkroot" would be an apt name for this cute little plant!











