Serpocaulon articulatum and S. caceresii (Sodiro) A.R. Sm. are very often confused in the collections, however, there is a remarkable difference between them, the lanceolate brown rhizome scale and the inconspicuous subsidiary veins (vs. the long linear-lanceolate dark rhizome scale and the conspicuous subsidiary veins).

Photo by J.L. Peña