This scan shows three of these flymphs that survived, and were still in my wallet when I returned home. You can see that the first one was bent during battle.

Here is one of the lean Madison rainbows caught on a pink flymph. What these mountain trout lacked in weight, they made up for in strength.

Here is the essential fly, on a #14 hook, with gold rib.

The dubbing is plain embroidery yarn, pale pink, snipped with scissors to different lengths from 1/8 to 3/8"—a new technique that I've started using recently, instead of cutting everything to the same length. Easier to work with, and looks more natural.

John Shaner had me fishing a classic Partridge and Orange with fine gold rib on the Firehole with mind-bending success. These are two of the survivors.

That was the only time I caught trout on consecutive casts, as John witnessed. This got me thinking about what would make a good flymph variation. So this pink flymph is essentially the traditional gold-ribbed Partridge and Orange with the addition of pale pink dubbing. Based on this experiment, the inexpensive embroidery wool may be enough, without resorting to hare's cheek, seal, etc.