Thanks for the very kind words all,
jrod, I think its one of the defining characteristics of H. pulcella, here is a quote from A. Fleischmann after an expedition to the tepuis in 2009
"...The nodding flowers of H. pulchella consist of four (rarely five) tepals. The inflorescence scape and pedicel are always densely pubescent. This is another good character to distinguish it from H. minor (which has a glabrous scape, just the pedicels are pubescent, too)..."
But the heli waters are so muddy IMHO