This is the true A. hildebrandii. Material once widely distributed under this name is correctly known as A. humilis.
Additional photos can be seen in a slideshow by clicking one of the links below:
- A full plant
- A comparison photo of the flowers of A. hildebrandii and A. humilis
An antique print nicely illustrates the unique flower shape the species. The flower color is somewhat variable (as it is in A. humilis), and those in the flower are distinctly more yellow than orange, although the markings are similar.