Sobre la presencia de una "vaina cristalifera" en el tallo de algunas especies de Dioscorea (Dioscoreaceae). (On the occurrence of a "crystalliferous sheath" in the stem of some species of Dioscorea (Dioscoreaceae).)

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith