Chris Larson ... "T. ionantha Curly Top came from a group of T. ionantha imported from Lau back in the early 90s. One lot of plants, vegetatively produced, had a very stocky curly leaf. I assumed that these plants came from one particular plant - but due to Collectors Corners production methods - I couldn't be sure of this. Bob Hudson got one of these - probably the best - and registered it.
I gathered the rest of the plants that I thought were the siblings, which all exhibited what I thought to be the exact same traits as the registered T. ionantha Curly Top. I then propagated these. This is what you have Ray.
The other plants in that shipment (T. ionantha "Mexico Lau") all look like yours, Ray. But those I have that are sold as T. ionantha "Mexico Lau" that look like yours never develop the same traits as the T. ionantha Curly Top group, when grown side by side.
So the answer is - I reckon the traits exhibited by your plant is due to cultural conditions. It will be one of the T. Curly Top, but under your condition it will not show up in the same way as it does in Qld. In much the same way as Neoregelias in Qld can have rows of leaves stacked up, and when the same plant is grown in the south it doesn't ever look the same. Same plant, same genes. We can get it here in Melbourne, but only in a heated greenhouse with high humidity.
The T. ionantha Curly Leaf is a plant from out of Asia, only a recent import - but has been around for a little while. I assume that this plant is under commercial production, and therefore spread around the world under this name. A very nicely recurved plant. It is quite stunning, as seen in the attached photo. Great colour, great shape.
T. Curly Leaf does not have the wider over-lapping bases of the leaves of Lau's T. ionantha."
Ray Clark ... "Chris has raised a point that was in the back of my mind, is the appearance of my (Curly Tops) due to climatic conditions over a longish period? Recently when cross checking names I have taken the date that I got them into account and as Chris says T. ’Curly Leaf’ is a more recent addition to the BCR. The plants in my original post came from Chris in early 2011. The plant in the later attached pic is from Chris also and a much more recent acquisition so I will watch how it behaves over time.
In the meantime my labels won’t change, take care all."