|Red List Category & Criteria:
||Santiana, J. & Pitman, N.
||Valencia, R., Pitman, N., Léon-Yánez, S. & Jørgensen, P.M. (Ecuador Plants Red List Authority)
A shrub endemic to the eastern slopes of the Ecuadorean Andes, where three subpopulations are known. The best-collected subpopulation is near Puyo, where the species is locally abundant and grows in disturbed and exposed areas. Also recorded on the Baeza-Lago Agrio road and near El Reventador. The species may be more abundant than the herbarium record suggests, because herbarium specimens of P. napo-pastazanum are frequently incorrectly classified as P. aduncum. Apart from habitat destruction, no specific threats are known.