Carolyn, I image specimens at the University of Alaska, Anchorage. Today I imaged a number of Erysimum. Never heard of them before, but they are indeed part of the mustard family. Seems like this forum is where I need to lurk. I also take care of accession into and taking pictures of the rock garden at the Alaska Botanical Garden in Anchorage. I have learned so much. I have been trying to identify a plant called Draba bryoides. Found it might be Draba uncertain ssp. bryoides. Did a bunch of Draba todays also and can see why there would be confusion in identification. Lol