Earlier, I was in error when saying the Lupines model used in the image was "out of the box" unmodified. At sometime early in the process I had increased opacity on all the components of the model; leaves, branches - and, the blossoms (blossoms at 1.5; everything else at 1). Did this to make the the Lupines stand out better.
The attached clipping is of the lower right side of the image; and, the model settings are untouched. Except for the leaves, the blossoms hardly stand out. Compare this with the original image.