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Name: Carol Noel Hawaii (near Hilo) It's all about choices.
I don't believe that name is correct, Emilio. H. subquintuplinervis has very very thick leaves, not such 'outstanding' venation and the base of the leaf is not correct for it to be subq. Here is a photo of what I have from David Liddle as subq. It also gets a red margin in bright light, and the apex is different. You could have either a H. pottsii (and there IS a sp. Chiang Mai) or H. rigida.
Here I am again, on an old post! But I'm learning here, which is nice. I got my subquintuplinervis from Ted Green in '08 and it looks like Emilio's, too. Well, I suppose I'll have to wait for it to bloom to know what I have. In the meantime, I must see if I can find a real subQ! I love the leaves in Carol's photo! Are the leaves as big as pottsii leaves? They look smaller in the photo...