Do Waldsteinia and Obregonia contain the same number of species?
Obregonia Obregonia, the artichoke cactus, is a genus of cacti with a single species, Obregonia denegrii. The species is endemic to the state of Tamaulipas in Mexico.
Obsidia Obsidia is an Austrian gothic metal band consisting of Sir Iwain, Lucrezia, Tajy, Drake and, since 2010, Rodans. The name is derived from the volcanic stone Obsidian.