Blotch Heat Stability

As mentioned in a previous post (The Hulthemia Holy Grail - Blotch Heat Stability), the heat stability of the Hulthemia blotch is one of the biggest challenges in breeding for this group of rose hybrids.  The Hulthemia shown below was a brand new seedling in 2011 and got my attention when it first bloomed.  I made a post (A Most Remarkable Blotch) about this seedling last year.  This year it appears to have excellent blotch heat stability given the fact that last week on the 2 days prior to this bloom opening, the temperature was 102º F and 108º F, and then 102º F again on the day this photo was taken.  Like many of the other Hulthemias with improved blotches, this one doesn't seem to release any pollen.