Here's one that you don't see too often. I bought it thinking it would be yellow but just my luck, it ended up green. Should have been in bloom for St. Patty's Day. I think the clone should be called 'Key Lime Pie'!
I've only ever seen 3 pics of this one on-line. Two were quite yellow, but one was greenish like mine, so obviously, there is variation. Jackii (used to be a malipoense) is green so in my case dominated over armeniacum. I bought the plant based on the vendors pic which was the same shape as mine but the yellow of armeniacum. I would prefer yellow but its starting to grow on now. It might actually turn a bit more yellow as it ages. Hopefully the dimple will disappear in the next blooming. I'm happy to say it has a double growth forming so maybe 2 blooms next year!