Nototriche chancoae, a new species from the Andes of Lima, Peru, is described and illustrated. This species is related to N. glacialis, N. nigrescens and N. congesta in having flabellate laminae, hairy hypophyllum, inner side of the hairy calyx towards the apex of the lobes and corolla with tube present; It is distinguished by having wider vaginas and the outer side of the calyx with glabrous tube. The description, illustration and photographs of the new species are included, as well as a dichotomous key to the Nototriche species most similar in morphology to N. chancoae.

Nototriche is represented in Peru by 62 species and is the fourth megadiverse genus in the high Andes. In the context of the taxonomic treatment of this genus for the Peruvian flora, 25 names were identified that need to be typified to stabilize their nomenclature. For the nomenclatural treatment, the protologs are analyzed and the type material is studied physically or through online images. Lectotypifying is carried out in accordance with the indications of the current International Code of Nomenclature for Algae, Fungi and Plants. Lectotypes are designated for 21 names related to Nototriche species that inhabit the Peruvian flora. Likewise, two neotypes are designated and clarifications are provided on the holotypes of two species.

Tarasa is a genus endemic to the Americas that is represented in Peru by 14 species. In the context of the taxonomic treatment of this genus for the Peruvian flora, two names of species that need to be typified to stabilize their nomenclature were identified. For the nomenclatural treatment, the protologues are analyzed and the type material is studied in physical or through online images. Lectotypifying is carried out in accordance with the indications of the current International Code of Nomenclature for Algae, Fungi and Plants. Lectotypes are designated for two names of Tarasa species endemic to Peru.