Hi Rob, I have Calochortus albus "Sierra Nevada Form" just finishing up flowering now. Two out of the three bulbs that flowered had white petals and pink tepals. These two plants also had dark stems, similar to your, where as the all white flower one has green stems. I was thinking the pink ones, I have, might be albus var. rubellus but seeing yours makes me think it might just be variation in the species. There is some seed setting on all three plants so maybe would could do a seed swap at the end of the season. Regards, Shayne. Yackandandah.........