Costus sepacuitensis Rowlee - Collected by Robert Griggs in 1902, named and described by W. W. Rowlee in 1922, this species form was virtually unknown to botany, listed as an "insufficiently known species" in the Maas monograph. I saw this species in 2017 in Oaxaca, Mexico and it was thought to be a new and undescribed species. It is characterized by its separate basal inflorescence, large leaves, pubescence of all vegetative parts, and the deeply split lobes of the calyx (see last photo). Rowlee did not see the flower and it was not described at all until now, by these first ever photos of this species.

It is thought to be quite rare, possibly endangered, and the GPS coordinates here have been disguised from the exact location.