There is some mention of fragrance further down in the article, wwh, and what is stated is fascinating. I'll go ahead and paste it here:

The flowers release a musky aroma several hours after opening. This attracts hawkmoths, the
primary pollinator of these flowers. A hawkmoth can unfurl its proboscis to suck up nectar that forms at the base of the funnel-shaped flower. In the morning, bees may linger in the floral tube, but they have little to do with pollination. The bees are more after pollen for themselves.

Wasn't it here on AWAD that we were recently discussing the various types of orchids that release various types of attractants for their pollinators? Someone had written that one type of orchid released an odor similar to rotting meat to attract flies! These flowers sound almost intelligent!