I could not find any Utah Chenopodium with pinnatifid leaves like this. The only species with subpinnatifid leaves, Chenopodium graveolens, is not reported in Utah and has a different inflorescence. Other species have mostly simple, occasionally shallowly lobed leaves. Occurs at elevation 2854 m. What is this?
I did, without any success. Out of five Artemisia species listed for Wasatch Range, only A. ludoviciana and A. biennis may have lobed or pinnatifid leaves. Both do not match, neither flowers nor leaves. Wider search among Artemisia did not find anything either.
Same story with Ambrosia. Five species to consider. Many with pinnate and double/triple pinnate leaves. The flowers, however, are very specific - more Artemisia-like, only hanging in spikes, not erect. Next summer, need to go there and look at it under a microscope. Hope to find a hybrid between Artemisia ludoviciana and Chenopodium album :))
Nop, didn't think about this at that time. It is a learning curve: first, you photograph various stuff without knowing what exactly is needed for identification; later you start paying attention to the key features and this helps to resolve most of species; finally, you are left with a bunch of samples that cannot be resolved until you collect ALL the alternatives, because of highly ambiguous keys. These particular photographs are from 2009, my first attempts.
