I agree with julz that this species is very interesting.
The large white stripe in the middle of the tepals is characteristic of Rhodophiala laeta, but the the thin purple stripes in the center of the flower is very reminiscent of Rhodophiala rhodolirion. However, these same stripes can be sometimes present in Rhodophiala ananuca, which is usually almost pure white. Looking at the type of soil (sand), I would say that this habitat is of R. ananuca which loves sand. My guess would be that it may be a hybrid between a R. ananuca and R. laeta. To confirm that one would have to know whether there are more plants of that time or whether this is a unique specimen. In the red book of flora of III Region (http://www.biouls.cl/lrojo/lrojo03/publ ... bro/06.pdf
), where the Pan de Azucar is located, there are no alternative species which could considered.
In nature for Rhodophialas from north I have observed large variation of color, and even in very homogenous populations of R. bagnoldii (pure yellow color), about 0.1% are orange.
So, whether this plant is a hybrid, a genetic variation, or even a new species is very difficult to determine... But one thing remains certain, that is one of the most beautiful Chilean plants!