Massonia inflorescences, photographed with a camera being sensitive to UV, visible, and IR light, in combination with a UV-transmissible lens and a UV filter (transmitting at 320–380 nm) under UV illumination, showing strong UV absorption (appearing black) of the nectar in flowers of M. grandiflora (A, note the glossy nectar only in the left flowers of the inflorescence) and M. echinata (B, note the glossy nectar only in the lower flowers of the inflorescence). Compare with Fig. 1C, D, G, H. Scale bars = 1 cm.