Costus elegans Veitch ex J.Dix in Proc. Roy. Hort. Soc. London 1: 205 (1860) (syn. Costus malortieanus); Central American endemic (Costa Rica, Honduras, Nicaragua) [https://powo.science.kew.org]. Costaceae. Estación Biológica La Selva HQ (N10.43130 W84.00373, 55m asl). Prov. Heredia, Costa Rica.
Costus woodsonii Maas Fl. Neotrop. Monogr. 8: 101 (1972) PA284a Costaceae [https://wfoplantlist.org]. ID: www.inaturalist.org/observations/185863228 etc. Inflorescence 75H x 25 diam mm; flower bud 30L mm. Coast between Villas Piña (N9.65670° W82.77512°, 10m asl) & Rio Hone mouth (N9.67288° W82.78862°, 5m asl). Puerto Viejo de Talamanca, Prov. Limón, 7040, Costa Rica.
Costus laevis Ruiz & Pav. Fl. Peruv. 1: 3 (1798) PA284a Costaceae [https://wfoplantlist.org]. Openeing flower 67 mm long. ID: www.inaturalist.org/observations/184727889. Laguna de Arenal peninsula (around N10.46792° W84.75814°, 611m asl) in PN Volcan Arenal, Prov. Alajuela, Costa Rica
pied des monts Atachi-Bakka (interfluve grand/petit Inini)