I posted a french lithograph of this plant last week, and now we have an official Science! Botanical Illustration of the same plant from the Smithsonian. The other one is available for purchase. This one is not.
Selenicereus grandiflorus (Cactaceae)
From the Catalog of Botanical Illustrations, Department of Botany, Smithsonian Institution
Plate Number: 247
Publication: The Cactaceae Vol. 2 Pl 33, Fig 1,2 and 3
Client: Britton, N.L. and Rose, J.N. – Size: 11×14
Collection: C.F. Baker, Cuba; flowering branch, fruit.
Artist: Eaton, Mary Emily – Date unknown – watercolor
© Smithsonian Institution