PLANT FAMILY: Costaceae
BOTANICAL NAME: Costus tarmicus
FORMAL SCIENTIFIC NAME:
Listed on the International Plant Names Index at http://www.ipni.org/ - author listed as Loes.
Maas in Flora Neotropica No. 8, lists this as an obsolete syn. for Costus guanaiensis var. tarmicus
UPDATE: In November 2016 I traveled to central Peru in the area around Tingo Maria, Dept. Huanuco to visit the type locality of three species: Costus laevis, Costus scaber and Dimerocostus argenteus, which were collected and described over 200 years ago by HipÃ³lito Ruiz. At the poblado Cuchero, where Ruiz had stayed for several months I found a plant that best fits the currently described species Costus guanaiensis var. tarmicus, and has sometimes been attributed to an undescribed species Costus aff. claviger. The plant found at Cuchero matches very closely to the written description by Ruiz of a plant he named as Costus laevis. The entire situation is further complicated by the fact that the holotype of his Costus laevis is yet a different plant, also found in this region, that most closely fits to the currently described Costus spiralis. I suspect that the Cuchero plant is the same plant form as was collected, named and described as Costus tarmicus, from La Merced in Junin Dept. of Peru. Further research is needed to sort all this out, but the report of my findings is published in the December 2016 quarterly Bulletin of the Heliconia Society International. SeePID 7605.