Costus obscurus D.Skinner & Maas A cultivated plant from Plowman’s type collection showing upright orientation of leaf lamina B inflorescence C cultivated plant showing colours and upright orientation of leaf lamina D photo showing villose indument on leaf sheaths E Indument on adaxial leaf surface F indument on abaxial leaf surface A, B cultivated specimen from Lyon Arboretum, Hawaii L-81.0901 grown from seeds wild collected by Tim Plowman from the plant accessioned as Plowman 5054 C–F photos taken in Pantiacolla, Madre de Dios, Perú prior to collecting seeds for D.Skinner R3322, currently in cultivation. Photos A–F by Dave Skinner.

  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.