leaf and inflorescence; drawing in Van Houtte, 1853-54, Flore des Serres et des Jardines de l' Europe
young leaf, photograph by H.D.C. de Wit, NHN Wageningen
top part of inflorescence with bracteole; drawing by E.Vijsma, in Flora Malesiana 12 (2) f. 43, reproduced from Blumea 15, f. 1