Fermi,
Calochortus argillosus is certainly a gem.
Now that we are based in Sacramento, their native habitat is only 1 hour away. My grandfather farmed in the rich farmland that is bordered by the clay hills to the south where this species grows. I am so busy with projects.... but with some good fortune I can check on them this spring. Generally I think of Calochortus argillosus as having a central red spot
surrounded by pale yellow. There are other Calochortus species that grow in this vicinity. Hybrids and introgression are, of coarse, possible. I certainly would like to look into this. I'll never get bored! I would very much like to update my personal observations of this species. If there is time for this outing and the timing is right I will certainly share photographs.
Most of our Calochortus have poked the tips of their leaves above ground. I'm out of town for 3 weeks... and the slugs are on the move.

Same with the Themidaceae. I found a pink and white color break on Dichelostemma capitatum a few springs ago. I went back to tag and photograph it. Deer ate the top off and I could not find the plant. Stuff happens.
