Costus callosus Maas & H.Maas A plant in habitat B inflorescence C separate flowering shoot D bract and flower details showing very long bract callus E, F cultivated plant A, C, D observation from Willie Mazu site, Bocas del Toro, Panama B plant in cultivation at Lyon Arboretum 2003.0125, collected in Costa Rica by Alan Carle E, F plant observed at Reserva Natural Nirvana, Valle del Cauca, Colombia. Photos A, C, D by Dave Skinner, B by John Mood, E, F by Paul Maas.

  Part of: Maas PJM, Maas-van de Kamer H, André T, Skinner D, Valderrama E, Specht CD (2023) Eighteen new species of Neotropical Costaceae (Zingiberales). PhytoKeys 222: 75-127.