Key to species of Nothotalisia (modified from Thomas 2011) 1. Fruit surface wrinkled, roughly cancellate, ripening to orange; petals 2.6–3.3 mm long............... N. cancellata Thomas (2011: 58) - Fruit surface smooth, ripening to olive or yellowish; petals 1.3–2.7 mm long (unknown for pistillate flowers of N. karsticola)....2 2. Leaflet blades puberulous abaxially, staminate flowers with petals 2.3–2.7 mm long, anthers apically mucronate ...... N. karsticola - Leaflet blades glabrous abaxially, staminate flowers with petals 1.3–2.4 mm, anthers apically blunt, not mucronate .....................3 3. Leaflets 3–8, narrowly elliptic to elliptic, the largest lateral leaflet 1.9–5.7 cm wide .................................................... N. peruviana - Leaflets (1–)3(–4), elliptic ovate or obovate, the largest lateral leaflet 3.5–9.0 cm wide.................................................... N. piranii

Published as part of Londoño-Echeverri, Yeison & Trujillo-López, Ana María, 2023, Taxonomic studies in Colombian Picramniaceae (Picramniales): new species of Aenigmanu, Nothotalisia and Picramnia from the Pacific and Magdalena Valley regions, pp. 281-297 in Phytotaxa 622 (5) on page 291, DOI: 10.11646/phytotaxa.622.5.2, http://zenodo.org/record/10150899