A plants range may extend into UHL range without being UHL itself, though the location of the plant themselves might make them more fussy in temperature range... A good example of this is N. burbidgeae which actually grows better as a intermediate, but extends into UHL range, there are also ampullaria which extend into the lower threshold of highland, though I would not consider them highland plants, but can probably take highland temps a bit better than their lowland counterparts...
I know a few people personally who grow this hairy "hamata" and the plants are more difficult than hamata themselves... Personally I think we are looking at a new species that needs to be described... There are more differences in this plant that I see, than there are between N. tentaculata and N. nigra... I guess we will see in the future, but good luck finding one of these beauties.... I stupidly passed up the chance to get one 3 years ago, and regret it to this day... Oh well.