Now known as Sinningia aggregata. S. aggregata has been much used in hybridizing. A photo of a plant can be seen here.
These two prints come from two different simultaneous editions of Curtis’s Botanical Magazine. The image to the left is from the standard size format. The image to the right is from a large-format edition, where the prints were made on large oversize pages, although the actual print was the same size and made from the same plate.
As can be seen from the plant picture linked above, the actual flower color is red to reddish orange, as in the print to the left above. The pinkish color in the large format edition is not a color found in the species, and is an artifact of the colorist’s choice of paint, made without benefit of seeing the actual plant.