This is a small semishrub endemic to Madagascar and considered endangered.
Material photographed in Botanical Garden of the University of Copenhagen, Denmark 29 June 2014.

Image reference: UNCA_GRA_B1406291554_VIS.jpg
Visible light: Nikon Df, Voigtländer APO-Lanthar 125 mm f/2.5, daylight

Image reference: UNCA_GRA_I1406291903_UV.jpg
Ultraviolet light: Nikon D3200 (modified), Coastal Optics 60 mm f/4 APO lens, internal Baader U2" (Venus) filter, SB-140 flash.
The shimmering quality of the corolla under UV light is due to conical cells.
[Published 30 June 2014]