I've started calling this one "Triffid" after the 50s scifi book & movie about plants from outer space since I can't ID it. Any ideas? Leaves are solid green, filled with grainy, green gel material. It grew the top stalk quickly last summer, then stopped growing, never flowered. Seems happy in cactus-type soil and window light. This one has stumped the Oklahoma U. Dept of Botany & many others. In 18 months looking on the web, I've seen only 2 anything like it, one mis-identified as the crassula "propeller" plant and the other had no id. Would appreciate any help! Thanks!