Heptacodium is monotypic, with only one species in the genus – seven-son flower. Unknown to Western science prior to 1907, it was encountered by E.H. Wilson during one of his expeditions to China. It remained unknown to Western horticulture until 73 years later when a group of scientists from the Arnold Arboretum and the US National Arboretum collected seed from a cultivated plant in Hangzhou Botanical Garden (the photograph is of a plant grown from one of those seeds). Stephen Spongberg, one of the members of the expedition, notes “…today there are undoubtedly more individual plants in cultivation in North America than in all of China” – you can read more of his recollections on Heptacodium from the expedition here.
The Kemper Center for Home Gardening has extensive photographs of the entire plant, including the flowers: Heptacodium miconioides.
To create this black-and-white, I used some of the Orton Imagery Techniques but did not digitally overexpose the image as suggested. Instead, I only did a 20% screen blend on the duplicate image. From the final image, I chose to use the red channel on its own for the b+w rendition.
Photography resource link: High Dynamic Time Range Images, a new photographic technique developed by local scientist Martin Krzywinski (discovered via The Luminous Landscape) – “Capturing the flow of time in a single frame”.