@Daisyl. We agree on what plant we're talking about, just not it's name. I have called the pictured plants M. nejapensis for years. The Catalog of Life that the NGA uses as its definitive source for valid scientific names does not recognize M. nejapensis. The correct name is M. karwinskiana subsp nejapensis. Even this sites own plant database lists that plant as M. karwinskiana with three subspecies, karwinskiana, nejapensis, and beisellii. Of these, only subsp beiselii has a central spine, sometimes long, sometimes short. My point is that sometime long ago someone misidentified a plant, mass-produced it and we all bought in. It happens. Aside from online sources (world Plants, LLifLe etc) I have books by Britton and Rose, Anderson, Innes, etc. They have one thing in common, that name is invalid. FYI my plants are still labeled M. nejapensis, wish I knew what it really is.
