A–D Nasa humboldtiana E, F Nasa ramirezii G, H Nasa solaria A trifoliolate leaf of N. humboldtiana subsp. humboldtiana B flower of N. humboldtiana subsp. humboldtiana C flower of N. humboldtiana cf. subsp. obliqua from Chimborazo/Ecuador D flower of N. humboldtiana subsp. obliqua from Cajamarca/Peru E inflorescence of N. ramirezii with putative pollinator F flower of N. ramirezii G flower of N. solaria H habit of N. solaria. Photo credits: A–C X. Cornejo D T. Henning E, F: R. Ripley G, H P. Gonzáles.